SHTMLMailer Component
Properties Methods Events Config Settings Errors
The SHTMLMailer Component is used to send HTML emails, including embedded images.
Syntax
nsoftware.IPWorksSMIME.SHTMLMailer
Remarks
The SHTMLMailer Component supports both plaintext and Secure Sockets Layer/Transport Layer Security (SSL/TLS) connections (RFC 2487). When connecting over Secure Sockets Layer/Transport Layer Security (SSL/TLS) the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL-related settings are also supported through the Config method.
The component sends a message (provided in MessageHTML and MessageText). The HTML message may contain references to images that are automatically embedded into the message.
The MessageHTML property contains the HTML version of the message. The corresponding plaintext version is provided in the MessageText property.
When MessageHTML is set, the component automatically computes a plaintext version of the text and puts it into MessageText. You may choose to override this default text with your own version.
The recipients are specified by the SendTo, Cc, and BCc properties, and the message subject by the Subject property.
Once all the appropriate properties have been set, call the Send method and your message will be sent to its intended recipient(s).
Other SMTP headers may be specified through the OtherHeaders property. Information about interaction with the server is provided by the PITrail event.
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
| Attachments | This property contains paths of the files to attach to the message. |
| AuthMechanism | This property is used when connecting to the mail server. |
| BCc | This property includes a comma-separated list of addresses for blind carbon copies (optional). |
| Cc | This property includes a comma-separated list of addresses for carbon copies (optional). |
| Certificate | This property includes the current selected certificate. |
| Connected | Whether the component is connected. |
| DeliveryNotificationTo | This property includes the email address to which to send a delivery notification. |
| EncryptingAlgorithm | The property includes textual description of the encrypting algorithm. |
| Firewall | A set of properties related to firewall access. |
| From | This property includes the email address of the sender (required). |
| HTMLFile | This property includes the path to a local HTML file. |
| Idle | The current status of the component. |
| Images | This property includes the embedded images in the HTML message. |
| Importance | This property indicates the importance of the mail message (optional). |
| IncludeCertificate | This property specifies whether to include the signer's certificate with the signed message. |
| IncludeChain | This property specifies whether to include the signer's certificate chain with the signed message. |
| LastReply | This property indicates the last reply received from the server. |
| LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| MailPort | This property includes the server port for SMTP (default 25). |
| MailServer | This property includes the name or address of a mail server (mail relay). |
| MessageDate | This property includes the date of the mail message (optional). |
| MessageHTML | This property includes the HTML version of the message. |
| MessageId | This property includes the message identifier for the message. |
| MessageRecipients | This property includes the collection of recipients of the message. |
| MessageText | This property includes the plaintext version of the message. |
| OtherHeaders | This property includes an RFC 822-compliant string consisting of extra headers. |
| ParseHTML | This property controls the behavior of the MessageHTML property. |
| Password | This property includes a password for logon to the MailServer . |
| Priority | This property includes the priority of the mail message (optional). |
| ReadReceiptTo | This property includes the email address to send a read-receipt to. |
| ReplyTo | This property includes a mail address to which to reply (optional). |
| SendTo | This property includes a comma-separated list of addresses for destinations (required). |
| Sensitivity | This property indicates the sensitivity of the mail message (optional). |
| SigningAlgorithm | This property includes a textual description of the signature hash algorithm. |
| SSLAcceptServerCert | Instructs the component to unconditionally accept the server certificate that matches the supplied certificate. |
| SSLCert | The certificate to be used during Secure Sockets Layer (SSL) negotiation. |
| SSLEnabled | This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled. |
| SSLProvider | The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use. |
| SSLServerCert | The server certificate for the last established connection. |
| SSLStartMode | This property determines how the component starts the Secure Sockets Layer (SSL) negotiation. |
| Subject | This property includes the subject of the mail message (optional). |
| Timeout | The timeout for the component. |
| User | This property includes the user identifier needed to log in as in the MailServer . |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
| AddAttachment | This adds FileName as an attachment. |
| AddRecipientCert | This method is used to add recipient certificates used to encrypt messages. |
| CalcMessageText | This method populates MessageText with the plaintext version of the message. |
| Config | Sets or retrieves a configuration setting. |
| Connect | This method connects to the mail relay and sends the SMTP HELO command. |
| Disconnect | This method disconnects from the SMTP server. |
| DoEvents | This method processes events from the internal message queue. |
| Encrypt | This method encrypts the message. |
| Interrupt | This method interrupts the current method. |
| ProcessQueue | This method sends the messages that previously have been queued into QueueDir . |
| Queue | This method queues the message into QueueDir . |
| Reset | This method will reset the component. |
| ResetHeaders | This method resets all the message headers to empty. |
| Send | This method sends the current message and MIME-encoded attachment. |
| SendCommand | This method sends the exact command directly to the server. |
| SetMessageHTMLStream | This method sets the stream from which the component will read the HTML version of the message. |
| Sign | This method signs the current message. |
| SignAndEncrypt | This method signs and encrypts the current message. |
Event List
The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.
| ConnectionStatus | Fired to indicate changes in the connection state. |
| EndTransfer | This event is fired when the message text completes transferring. |
| Error | Fired when information is available about errors during data delivery. |
| PITrail | This event traces the commands sent to the mail server, and the respective replies. |
| SSLServerAuthentication | Fired after the server presents its certificate to the client. |
| SSLStatus | Fired when secure connection progress messages are available. |
| StartTransfer | This event is fired when the message text starts transferring. |
| Transfer | This event is fired when the message text is transferred to MailServer . |
Config Settings
The following is a list of config settings for the component with short descriptions. Click on the links for further details.
| AttachmentEncoding[index] | Content-Transfer-Encoding for attached file (at index). |
| AttachmentType[index] | Content-type for attached file (at index). |
| Charset | When set, the charset Content-Type attribute will be added using the specified value. |
| ExcludeTags | Specifies tags that will be excluded when calculating MessageText. |
| MessageTextEncoding | When set, the MessageHTML and MessageText values will be encoded using the specified encoding. |
| OverrideFileName | If set to true, the AttachmentName property value will be used to set the MIME part FileName attribute. |
| TempFilePath | If set, the temporary files created during message creation will be put in the path specified. |
| UseTempFile | Determines if temporary files are used during message creation. |
| UseTempFile | If set, the component uses temporary files when generating messages. |
| AllowEmptyTo | If set to True, then the SendTo property is not required. |
| AuthorizationIdentity | The value to use as the authorization identity when SASL authentication is used. |
| Charset | When set, the message headers will be encoded using the specified Charset. |
| FoldHeaders | Tells the component whether to fold the headers. |
| Hello | The argument for HELO (herald) command to the server (defaults to local host name). |
| KeepQueue | If set to True, queued files are not deleted after a successful send. |
| MaxHeaderLength | Maximum length for headers to avoid line folding (default 80). |
| MessageHeadersString | String representation of RFC822-encoded headers of the message. |
| MessageIdAlgorithm | Determines the algorithm used to hash the random MessageId. |
| OtherHeaders | An RFC 822 compliant string consisting of extra headers. |
| ReturnPath | Sets the Return-Path to be used for sending email. |
| SendRSET | Whether to send RSET command. |
| StopOnBccErrors | Instructs the component to stop sending the message if the server does not acknowledge any of the BCCs. |
| StopOnCcErrors | Instructs the component to stop sending the message if the server does not acknowledge any of the CCs. |
| StopOnToErrors | Instructs the component to stop sending the message if the server does not acknowledge any of the TOs. |
| TransferText | String representation of RFC822-encoded body of the message. |
| CloseStreamAfterTransfer | If true, the component will close the upload or download stream after the transfer. |
| ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
| FirewallAutoDetect | Tells the component whether or not to automatically detect and use firewall system settings, if available. |
| FirewallHost | Name or IP address of firewall (optional). |
| FirewallListener | If true, the component binds to a SOCKS firewall as a server (TCPClient only). |
| FirewallPassword | Password to be used if authentication is to be used when connecting through the firewall. |
| FirewallPort | The TCP port for the FirewallHost;. |
| FirewallType | Determines the type of firewall to connect through. |
| FirewallUser | A user name if authentication is to be used connecting through a firewall. |
| KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| Linger | When set to True, connections are terminated gracefully. |
| LingerTime | Time in seconds to have the connection linger. |
| LocalHost | The name of the local host through which connections are initiated or accepted. |
| LocalPort | The port in the local host where the component binds. |
| MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
| MaxTransferRate | The transfer rate limit in bytes per second. |
| ProxyExceptionsList | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
| TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
| TcpNoDelay | Whether or not to delay when sending packets. |
| UseIPv6 | Whether to use IPv6. |
| UseNTLMv2 | Whether to use NTLM V2. |
| CACertFilePaths | The paths to CA certificate files when using Mono on Unix/Linux. |
| LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
| ReuseSSLSession | Determines if the SSL session is reused. |
| SSLCACerts | A newline separated list of CA certificates to be included when performing an SSL handshake. |
| SSLCheckCRL | Whether to check the Certificate Revocation List for the server certificate. |
| SSLCheckOCSP | Whether to use OCSP to check the status of the server certificate. |
| SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
| SSLClientCACerts | A newline separated list of CA certificates to use during SSL client certificate validation. |
| SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
| SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
| SSLEnableRenegotiation | Whether the renegotiation_info SSL extension is supported. |
| SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
| SSLKeyLogFile | The location of a file where per-session secrets are written for debugging purposes. |
| SSLNegotiatedCipher | Returns the negotiated cipher suite. |
| SSLNegotiatedCipherStrength | Returns the negotiated cipher suite strength. |
| SSLNegotiatedCipherSuite | Returns the negotiated cipher suite. |
| SSLNegotiatedKeyExchange | Returns the negotiated key exchange algorithm. |
| SSLNegotiatedKeyExchangeStrength | Returns the negotiated key exchange algorithm strength. |
| SSLNegotiatedVersion | Returns the negotiated protocol version. |
| SSLSecurityFlags | Flags that control certificate verification. |
| SSLServerCACerts | A newline separated list of CA certificates to use during SSL server certificate validation. |
| TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. |
| TLS12SupportedGroups | The supported groups for ECC. |
| TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
| TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
| TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
| AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| FirewallData | Used to send extra data to the firewall. |
| InBufferSize | The size in bytes of the incoming queue of the socket. |
| OutBufferSize | The size in bytes of the outgoing queue of the socket. |
| BuildInfo | Information about the product's build. |
| GUIAvailable | Whether or not a message loop is available for processing events. |
| LicenseInfo | Information about the current license. |
| MaskSensitiveData | Whether sensitive data is masked in log messages. |
| UseInternalSecurityAPI | Whether or not to use the system security libraries or an internal implementation. |
Attachments Property (SHTMLMailer Component)
This property contains paths of the files to attach to the message.
Syntax
public FileAttachmentList Attachments { get; }
Public Property Attachments As FileAttachmentList
Remarks
This property contains the path of a file on your system to be sent as an attachment with your message. The component will open the file and encode its contents in MIME format.
Example 1: Adding an Attachment
component.AddAttachment("C:\file1.zip");
component.AddAttachment("C:\file2.zip");
component.Send();
Example 2: Using an Attachments Collection
component.Attachments.Add(new nsoftware.IPWorks.FileAttachment("name", "C:\file.txt"));
This collection is indexed from 0 to count -1.
This property is not available at design time.
Please refer to the FileAttachment type for a complete list of fields.AuthMechanism Property (SHTMLMailer Component)
This property is used when connecting to the mail server.
Syntax
public SHTMLMailerAuthMechanisms AuthMechanism { get; set; }
enum SHTMLMailerAuthMechanisms { amUserPassword, amCRAMMD5, amNTLM, amAPOP, amSASLPlain, amSASLDigestMD5, amKerberos, amXOAUTH2 }
Public Property AuthMechanism As ShtmlmailerAuthMechanisms
Enum SHTMLMailerAuthMechanisms amUserPassword amCRAMMD5 amNTLM amAPOP amSASLPlain amSASLDigestMD5 amKerberos amXOAUTH2 End Enum
Default Value
0
Remarks
This is the authentication mechanism property to be used when connecting to the mail server.
By default, this property is amUserPassword (0), and if the User and Password properties are set, the AUTH command is sent to the server for authentication. If this property is set to amCRAMMD5 (1), CRAM-MD5 authentication is used instead.
If this property is set to amNTLM (2), NTLM authentication will be used.
If this property is set to amKerberos (6), Kerberos authentication will be used.
Note: This functionality is available only in Windows.
When set to amXOAUTH2 (7), set User to the username and AuthorizationIdentity to the OAuth token. See AuthorizationIdentity for details.
BCc Property (SHTMLMailer Component)
This property includes a comma-separated list of addresses for blind carbon copies (optional).
Syntax
Default Value
""
Remarks
This property specifies a comma-separated list of destinations for blind carbon copies of the mail message. A copy of the message is sent to each destination. Because no BCc SMTP header is created containing the destination addresses, individual recipients never see the list of the other recipients.
The component will return an error if the MailServer returns an error code about any email address specified in SendTo or Cc but it will fire an Error event only if the same thing happens with an email address specified in this property.
If the resulting header is longer than MaxHeaderLength, then it is folded according to RFC 822 specifications.
Note: You must clear the MessageRecipients collection before setting this property to remove previous recipients.
Cc Property (SHTMLMailer Component)
This property includes a comma-separated list of addresses for carbon copies (optional).
Syntax
Default Value
""
Remarks
This property specifies a comma-separated list of destinations for carbon copies of the mail message. A copy of the message is sent to each destination, and a Cc SMTP header is created containing the destination addresses. This header is sent to every recipient of the message. If you don't want to copy this information to every recipient, then use blind carbon copies instead (see the description of the BCc).
The component will return an error if the MailServer returns an error code about any email address specified in SendTo or Cc but it will fire an Error event only if the same thing happens with an email address specified in BCc.
If the resulting header is longer than MaxHeaderLength, then it is folded according to RFC 822 specifications.
Note: You must clear the MessageRecipients collection before setting this property to remove previous recipients.
Certificate Property (SHTMLMailer Component)
This property includes the current selected certificate.
Syntax
public Certificate Certificate { get; set; }
Public Property Certificate As Certificate
Remarks
This property is populated when a specified certificate is found or loaded by the component. This property is used to specify private keys. Set this property to a valid Certificate object to perform different operations, such as Sign, Decrypt, SignAndEncrypt, or DecryptAndVerifySignature.
Please refer to the Certificate type for a complete list of fields.Connected Property (SHTMLMailer Component)
Whether the component is connected.
Syntax
Default Value
False
Remarks
This property is used to determine whether or not the component is connected to the remote host. Use the Connect and Disconnect methods to manage the connection.
This property is read-only and not available at design time.
DeliveryNotificationTo Property (SHTMLMailer Component)
This property includes the email address to which to send a delivery notification.
Syntax
Default Value
""
Remarks
This property contains the email address to send to which to send a delivery notification. When set, a Return-Receipt-To header is added to the message. This property should be set to an email address that can receive the delivery notification.
EncryptingAlgorithm Property (SHTMLMailer Component)
The property includes textual description of the encrypting algorithm.
Syntax
Default Value
"3DES"
Remarks
This property contains either the name of the algorithm (such as 3DES or AES), or an object identifier (OID) string representing the algorithm.
Possible values are as follows:
- "3DES"
- "DES"
- "RC2CBC40"
- "RC2CBC64"
- "RC2CBC128" or "RC2"
- "AESCBC128" or "AES"
- "AESCBC192"
- "AESCBC256"
- "AESGCM128" or "AESGCM"
- "AESGCM192"
- "AESGCM256"
Firewall Property (SHTMLMailer Component)
A set of properties related to firewall access.
Syntax
Remarks
This is a Firewall-type property, which contains fields describing the firewall through which the component will attempt to connect.
Please refer to the Firewall type for a complete list of fields.From Property (SHTMLMailer Component)
This property includes the email address of the sender (required).
Syntax
Default Value
""
Remarks
This property is used to create a From SMTP header. This header identifies the sender of the message. A valid email address is required. Examples of valid addresses are as follows: "Friendly Name" <address@company.com> or address@company.com
If the resulting header is longer than MaxHeaderLength, then it is folded according to RFC 822 specifications.
HTMLFile Property (SHTMLMailer Component)
This property includes the path to a local HTML file.
Syntax
Default Value
""
Remarks
This property may contain the path to the local HTML file. If this property is not empty, the contents of the file with that name will be appended to the text in MessageHTML.
Note: This means that if MessageHTML is empty, HTMLFile is what will be sent to the server.
This property is not available at design time.
Idle Property (SHTMLMailer Component)
The current status of the component.
Syntax
Default Value
True
Remarks
This property will be False if the component is currently busy (communicating or waiting for an answer), and True at all other times.
This property is read-only.
Images Property (SHTMLMailer Component)
This property includes the embedded images in the HTML message.
Syntax
public HTMLImageList Images { get; }
Public Property Images As HTMLImageList
Remarks
This property contains the names of the image files embedded into the HTML message. The collection is updated every time MessageHTML is set. You may change the file names before sending (e.g., if they don't point to valid files).
This collection is indexed from 0 to count -1.
Please refer to the HTMLImage type for a complete list of fields.Importance Property (SHTMLMailer Component)
This property indicates the importance of the mail message (optional).
Syntax
public SHTMLMailerImportances Importance { get; set; }
enum SHTMLMailerImportances { miUnspecified, miHigh, miNormal, miLow }
Public Property Importance As ShtmlmailerImportances
Enum SHTMLMailerImportances miUnspecified miHigh miNormal miLow End Enum
Default Value
0
Remarks
This property indicates the importance of the mail message (optional). When set, an Importance header will be added to the message.
Importance is an indication to the recipient(s) about the level of importance of the message. The possible values are Unspecified (0), High (1), Normal (2), and Low (3).
IncludeCertificate Property (SHTMLMailer Component)
This property specifies whether to include the signer's certificate with the signed message.
Syntax
Default Value
True
Remarks
If this property is set to True, the certificate used to sign the message will be encoded and included in a message signature when calling Sign or SignAndEncrypt.
Including a certificate is the preferred method of building signed messages. If you do not include a certificate, the message recipient may not be able to verify the sender's signature.
IncludeChain Property (SHTMLMailer Component)
This property specifies whether to include the signer's certificate chain with the signed message.
Syntax
Default Value
False
Remarks
If this property is set to True, the entire certificate's chain that was used to sign the message will be encoded and included in the message signature when calling Sign or SignAndEncrypt.
Note: To include the chain, the IncludeCertificate property must also be set to true.
LastReply Property (SHTMLMailer Component)
This property indicates the last reply received from the server.
Syntax
Default Value
""
Remarks
This property indicates the last reply received from the server. It can be used for informational purposes. The same information and more also can be retrieved through the PITrail event.
This property is read-only.
LocalHost Property (SHTMLMailer Component)
The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
Syntax
Default Value
""
Remarks
This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.
In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the component initiate connections (or accept in the case of server components) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.
If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).
Note: LocalHost is not persistent. You must always set it in code, and never in the property window.
MailPort Property (SHTMLMailer Component)
This property includes the server port for SMTP (default 25).
Syntax
Default Value
25
Remarks
This property contains the server port for SMTP (default 25). A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.
For an implicit Secure Sockets Layer (SSL), use port 465 (please refer to the SSLStartMode property for more information).
This property is not available at design time.
MailServer Property (SHTMLMailer Component)
This property includes the name or address of a mail server (mail relay).
Syntax
Default Value
""
Remarks
This property specifies the IP address (IP number in dotted internet format) or domain name for a mail relay through which messages will be routed. It is set before a connection is attempted and cannot be changed once a connection is in progress.
The current version of the component does not provide a default value for the mail relay. You must provide a host name yourself. Generally, any internet host with an SMTP server will suffice (e.g., a UNIX host), but it is preferable to select a MailServer that is close to the machine sending mail.
If this property is set to a domain name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, an error is returned.
If the component is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.
MessageDate Property (SHTMLMailer Component)
This property includes the date of the mail message (optional).
Syntax
Default Value
"*"
Remarks
If this property contains a nonempty string, then a Date SMTP header is created and attached to the message. If it is an empty string, then the date information is added by the mail relay(s) the message goes through.
Special case: If this property is set to the special value "*", a Date SMTP header reflecting the current date and time is generated when MessageHeaders is computed and the message is sent. This is the default behavior of the component
RFC 822 contains detailed date format specifications. An example of a valid date is "Fri, 1 Mar 96 21:24:52 EST".
This property is not available at design time.
MessageHTML Property (SHTMLMailer Component)
This property includes the HTML version of the message.
Syntax
Default Value
""
Remarks
This property contains the HTML version of the message.
When this property is set, the component automatically computes a plaintext version of the text and puts it into MessageText. You may choose to override this default text with your own version.
Example. Setting MessageHTML:
component.MessageHTML = "<b>Hello</b>, my name is <i>Tom</i>";
MessageId Property (SHTMLMailer Component)
This property includes the message identifier for the message.
Syntax
Default Value
"*"
Remarks
This property contains the message identifier for the message. When set, the value of MessageId is used as the Message-Id header value of the message. A special value of "*" will automatically generate a random unique identifier for the message.
This property is not available at design time.
MessageRecipients Property (SHTMLMailer Component)
This property includes the collection of recipients of the message.
Syntax
public MessageRecipientList MessageRecipients { get; }
Public Property MessageRecipients As MessageRecipientList
Remarks
This property contains a collection that describes to whom the message is being sent. You may include all recipients in this property, even Cc's and BCc's, which are specified by the type field.
This collection is indexed from 0 to count -1.
Please refer to the MessageRecipient type for a complete list of fields.MessageText Property (SHTMLMailer Component)
This property includes the plaintext version of the message.
Syntax
Default Value
""
Remarks
This property is a plaintext version of the HTML message. This is necessary for recipients with legacy mail readers that do not support HTML.
The MessageHTML property contains the HTML version of the message. When MessageHTML is set, the component automatically computes a plaintext version of the text and puts it into this property. You may choose to override this default text with your own version.
OtherHeaders Property (SHTMLMailer Component)
This property includes an RFC 822-compliant string consisting of extra headers.
Syntax
Default Value
""
Remarks
This property contains a string of headers to be appended to the message headers created from other properties like SendTo, Subject, and so on.
The headers must be of the format "header: value" as specified in RFC 822. Header lines should be separated by CRLF ("\r\n") .
Use this property with caution. If this property contains invalid headers, message delivery might not be successful.
This property is useful for extending the functionality of the component. A good example is delivery of MIME-encoded messages.
Special case: If this property starts with an empty line (CRLF), then the value of this property is used instead of the normally computed message headers.
Example. Sending an Email with an Additional Header:
component.MailServer = "MyServer";
component.From = "me@server.com";
component.SendTo = "recipient@server.com";
component.Subject = "My Subject";
component.MessageText = "This is the message body.";
component.OtherHeaders = "HeaderName: HeaderValue";
component.Send();
This property is not available at design time.
ParseHTML Property (SHTMLMailer Component)
This property controls the behavior of the MessageHTML property.
Syntax
Default Value
True
Remarks
This property controls the behavior of the MessageHTML property. If ParseHTML is set to False, you must provide valid values in MessageHTML, MessageText, and Images.
Password Property (SHTMLMailer Component)
This property includes a password for logon to the MailServer .
Syntax
Default Value
""
Remarks
If this property is set to a nonempty string, then when connecting to the MailServer an AUTH or CRAM-MD5 (depending on the value of AuthMechanism) command is sent to provide authentication information for the user.
This property is not available at design time.
Priority Property (SHTMLMailer Component)
This property includes the priority of the mail message (optional).
Syntax
public SHTMLMailerPriorities Priority { get; set; }
enum SHTMLMailerPriorities { epUnspecified, epNormal, epUrgent, epNonUrgent }
Public Property Priority As ShtmlmailerPriorities
Enum SHTMLMailerPriorities epUnspecified epNormal epUrgent epNonUrgent End Enum
Default Value
0
Remarks
When this property is set, a priority header will be added to the message. Priority is an indication about the delivery priority of the message. The possible values are epNormal, epUrgent, and epNonUrgent.
ReadReceiptTo Property (SHTMLMailer Component)
This property includes the email address to send a read-receipt to.
Syntax
Default Value
""
Remarks
When this property is set, a Disposition-Notification-To header is added to the message. This property should be set to an email address that should receive the read-receipt.
ReplyTo Property (SHTMLMailer Component)
This property includes a mail address to which to reply (optional).
Syntax
Default Value
""
Remarks
If this property contains a nonempty string, a Reply-To SMTP header is created for the message. This header shows the address to use for replies, which is useful if this address is different from the one in From.
If the resulting header is longer than MaxHeaderLength, then it is folded according to RFC 822 specifications.
SendTo Property (SHTMLMailer Component)
This property includes a comma-separated list of addresses for destinations (required).
Syntax
Default Value
""
Remarks
This property specifies a comma-separated list of destinations for the mail message. A copy of the message is sent to each of them, and a To SMTP header is created containing the destination addresses.
Examples of valid addresses are as follows: "Friendly Name" <address@company.com> or address@company.com
The component will fail if the MailServer returns an error code about any email address specified in SendTo or Cc but it will silently ignore the error if the same thing happens with an email address specified in BCc.
If the resulting header is longer than MaxHeaderLength, then it is folded according to RFC 822 specifications.
Note: You must clear the MessageRecipients collection before setting this property to remove previous recipients.
Sensitivity Property (SHTMLMailer Component)
This property indicates the sensitivity of the mail message (optional).
Syntax
public SHTMLMailerSensitivities Sensitivity { get; set; }
enum SHTMLMailerSensitivities { esUnspecified, esPersonal, esPrivate, esCompanyConfidential }
Public Property Sensitivity As ShtmlmailerSensitivities
Enum SHTMLMailerSensitivities esUnspecified esPersonal esPrivate esCompanyConfidential End Enum
Default Value
0
Remarks
This property provides an indication of how sensitive it is to disclose the message to people other than the recipients of the message. When set, a Sensitivity header will added to the message. Possible values are as follows: esPersonal (1), esPrivate (2), and esCompanyConfidential (3).
SigningAlgorithm Property (SHTMLMailer Component)
This property includes a textual description of the signature hash algorithm.
Syntax
Default Value
"SHA256"
Remarks
This property specifies the hash algorithm used to prepare the message digest for signature.
This property must contain either the name of the algorithm (such as MD5 or SHA1), or an object Id (OID) string representing the hash algorithm. Possible values are as follows:
- sha1
- md5
- sha-256 (default)
- sha-384
- sha-512
- sha-224
When read, the value of the property always contains the OID of the algorithm, or an empty string if the algorithm is unknown.
SSLAcceptServerCert Property (SHTMLMailer Component)
Instructs the component to unconditionally accept the server certificate that matches the supplied certificate.
Syntax
public Certificate SSLAcceptServerCert { get; set; }
Public Property SSLAcceptServerCert As Certificate
Remarks
If it finds any issues with the certificate presented by the server, the component will normally terminate the connection with an error.
You may override this behavior by supplying a value for SSLAcceptServerCert. If the certificate supplied in SSLAcceptServerCert is the same as the certificate presented by the server, then the server certificate is accepted unconditionally, and the connection will continue normally.
Note: This functionality is provided only for cases in which you otherwise know that you are communicating with the right server. If used improperly, this property may create a security breach. Use it at your own risk.
Please refer to the Certificate type for a complete list of fields.SSLCert Property (SHTMLMailer Component)
The certificate to be used during Secure Sockets Layer (SSL) negotiation.
Syntax
public Certificate SSLCert { get; set; }
Public Property SSLCert As Certificate
Remarks
This property includes the digital certificate that the component will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the Encoded field to the encoded certificate. To select a certificate, use the store and subject fields.
Please refer to the Certificate type for a complete list of fields.SSLEnabled Property (SHTMLMailer Component)
This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled.
Syntax
Default Value
False
Remarks
This property specifies whether TLS/SSL is enabled in the component. When False (default), the component operates in plaintext mode. When True, TLS/SSL is enabled.
TLS/SSL may also be enabled by setting SSLStartMode. Setting SSLStartMode will automatically update this property value.
This property is not available at design time.
SSLProvider Property (SHTMLMailer Component)
The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.
Syntax
public SHTMLMailerSSLProviders SSLProvider { get; set; }
enum SHTMLMailerSSLProviders { sslpAutomatic, sslpPlatform, sslpInternal }
Public Property SSLProvider As ShtmlmailerSSLProviders
Enum SHTMLMailerSSLProviders sslpAutomatic sslpPlatform sslpInternal End Enum
Default Value
0
Remarks
This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic), the component will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.
Possible values are as follows:
| 0 (sslpAutomatic - default) | Automatically selects the appropriate implementation. |
| 1 (sslpPlatform) | Uses the platform/system implementation. |
| 2 (sslpInternal) | Uses the internal implementation. |
In most cases using the default value (Automatic) is recommended. The component will select a provider depending on the current platform.
When Automatic is selected, on Windows, the component will use the platform implementation. On Linux/macOS, the component will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols, the internal implementation is used on all platforms.
The .NET Standard library will always use the internal implementation on all platforms.
SSLServerCert Property (SHTMLMailer Component)
The server certificate for the last established connection.
Syntax
public Certificate SSLServerCert { get; }
Public ReadOnly Property SSLServerCert As Certificate
Remarks
This property contains the server certificate for the last established connection.
SSLServerCert is reset every time a new connection is attempted.
This property is read-only.
Please refer to the Certificate type for a complete list of fields.SSLStartMode Property (SHTMLMailer Component)
This property determines how the component starts the Secure Sockets Layer (SSL) negotiation.
Syntax
public SHTMLMailerSSLStartModes SSLStartMode { get; set; }
enum SHTMLMailerSSLStartModes { sslAutomatic, sslImplicit, sslExplicit, sslNone }
Public Property SSLStartMode As ShtmlmailerSSLStartModes
Enum SHTMLMailerSSLStartModes sslAutomatic sslImplicit sslExplicit sslNone End Enum
Default Value
3
Remarks
The SSLStartMode property may have one of the following values:
| 0 (sslAutomatic) | If the remote port is set to the standard plaintext port of the protocol (where applicable), the component will behave the same as if SSLStartMode is set to sslExplicit. In all other cases, SSL negotiation will be implicit (sslImplicit). |
| 1 (sslImplicit) | The SSL negotiation will start immediately after the connection is established. |
| 2 (sslExplicit) | The component will first connect in plaintext, and then will explicitly start SSL negotiation through a protocol command such as STARTTLS. |
| 3 (sslNone - default) | No SSL negotiation; no SSL security. All communication will be in plaintext mode. |
Subject Property (SHTMLMailer Component)
This property includes the subject of the mail message (optional).
Syntax
Default Value
""
Remarks
The string in this property is sent with a Subject SMTP header to the mail recipient.
If the resulting header is longer than MaxHeaderLength, then it is folded according to RFC 822 specifications.
Timeout Property (SHTMLMailer Component)
The timeout for the component.
Syntax
Default Value
60
Remarks
If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.
If Timeout is set to a positive value, the component will wait for the operation to complete before returning control.
The component will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive.
If Timeout expires, and the operation is not yet complete, the component throws an exception.
Note: By default, all timeouts are inactivity timeouts, that is, the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.
The default value for the Timeout property is 60 seconds.
User Property (SHTMLMailer Component)
This property includes the user identifier needed to log in as in the MailServer .
Syntax
Default Value
""
Remarks
If this property is set to a nonempty string, then when connecting to the MailServer an AUTH or CRAM-MD5 (depending on the value of AuthMechanism) command is sent to provide authentication information for the user.
This property is not available at design time.
AddAttachment Method (SHTMLMailer Component)
This adds FileName as an attachment.
Syntax
public void AddAttachment(string fileName); Async Version public async Task AddAttachment(string fileName); public async Task AddAttachment(string fileName, CancellationToken cancellationToken);
Public Sub AddAttachment(ByVal FileName As String) Async Version Public Sub AddAttachment(ByVal FileName As String) As Task Public Sub AddAttachment(ByVal FileName As String, cancellationToken As CancellationToken) As Task
Remarks
This method adds the file name as an attachment. The full list of attachments is contained in the Attachments property.
Example 1: Adding an Attachment
component.AddAttachment("C:\file1.zip");
component.AddAttachment("C:\file2.zip");
component.Send();
Example 2: Using an Attachments Collection
component.Attachments.Add(new nsoftware.IPWorks.FileAttachment("name", "C:\file.txt"));
AddRecipientCert Method (SHTMLMailer Component)
This method is used to add recipient certificates used to encrypt messages.
Syntax
public void AddRecipientCert(byte[] certEncoded); Async Version public async Task AddRecipientCert(byte[] certEncoded); public async Task AddRecipientCert(byte[] certEncoded, CancellationToken cancellationToken);
Public Sub AddRecipientCert(ByVal CertEncoded As String) Async Version Public Sub AddRecipientCert(ByVal CertEncoded As String) As Task Public Sub AddRecipientCert(ByVal CertEncoded As String, cancellationToken As CancellationToken) As Task
Remarks
This method is used to add recipient certificates to the internal MessageRecipients collection used to encrypt the Message. The recipient certificate must be a valid PKCS-encoded certificate. If the certificate provided is Base64 encoded, it will be decoded first by the object.
The CertMgr component may be used to retrieve the appropriate certificate from the system.
CalcMessageText Method (SHTMLMailer Component)
This method populates MessageText with the plaintext version of the message.
Syntax
public void CalcMessageText(); Async Version public async Task CalcMessageText(); public async Task CalcMessageText(CancellationToken cancellationToken);
Public Sub CalcMessageText() Async Version Public Sub CalcMessageText() As Task Public Sub CalcMessageText(cancellationToken As CancellationToken) As Task
Remarks
This method parses MessageHTML or HTMLFile and calculates a plaintext version of the message. The plaintext version is stored in the MessageText property.
Calling this method is optional. When the Send method is called, the component will automatically calculate a plaintext version of the message. This may be called in cases in which the plaintext version will be set explicitly. For instance:
component.MessageHTML="<html><body><b>Test Message</b></body></html>";
component.CalcMessageText();
component.MessageText = "A new custom plaintext message";
Config Method (SHTMLMailer Component)
Sets or retrieves a configuration setting.
Syntax
Remarks
Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.
These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.
To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).
To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.
Connect Method (SHTMLMailer Component)
This method connects to the mail relay and sends the SMTP HELO command.
Syntax
public void Connect(); Async Version public async Task Connect(); public async Task Connect(CancellationToken cancellationToken);
Public Sub Connect() Async Version Public Sub Connect() As Task Public Sub Connect(cancellationToken As CancellationToken) As Task
Remarks
This method connects to the mail relay and sends the SMTP HELO command, thus preparing to send messages. Any number of messages can later be sent using the Send method.
Example. Connecting and Sending an Email:
control.MailServer = "MyServer"
control.From = "me@server.com"
control.SendTo = "recipient@server.com"
control.Subject = "My Subject"
control.MessageText = "This is the message body"
control.Connect()
control.Send()
control.Disconnect()
Disconnect Method (SHTMLMailer Component)
This method disconnects from the SMTP server.
Syntax
public void Disconnect(); Async Version public async Task Disconnect(); public async Task Disconnect(CancellationToken cancellationToken);
Public Sub Disconnect() Async Version Public Sub Disconnect() As Task Public Sub Disconnect(cancellationToken As CancellationToken) As Task
Remarks
This method disconnects from the mail relay.
DoEvents Method (SHTMLMailer Component)
This method processes events from the internal message queue.
Syntax
public void DoEvents(); Async Version public async Task DoEvents(); public async Task DoEvents(CancellationToken cancellationToken);
Public Sub DoEvents() Async Version Public Sub DoEvents() As Task Public Sub DoEvents(cancellationToken As CancellationToken) As Task
Remarks
When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.
Encrypt Method (SHTMLMailer Component)
This method encrypts the message.
Syntax
public void Encrypt(); Async Version public async Task Encrypt(); public async Task Encrypt(CancellationToken cancellationToken);
Public Sub Encrypt() Async Version Public Sub Encrypt() As Task Public Sub Encrypt(cancellationToken As CancellationToken) As Task
Remarks
This method encrypts the input message in a Public Key Cryptography Standards (PKCS)-encoded envelope with all of the recipient certificates specified in the MessageRecipients collection.
Note: The message headers, including the Sender, Recipient(s), and Subject, are not encrypted. If this is sensitive information, consider including these headers in the message body as a MIME entity, and providing other headers for the S/MIME wrapper.
Interrupt Method (SHTMLMailer Component)
This method interrupts the current method.
Syntax
public void Interrupt(); Async Version public async Task Interrupt(); public async Task Interrupt(CancellationToken cancellationToken);
Public Sub Interrupt() Async Version Public Sub Interrupt() As Task Public Sub Interrupt(cancellationToken As CancellationToken) As Task
Remarks
If there is no method in progress, Interrupt simply returns, doing nothing.
ProcessQueue Method (SHTMLMailer Component)
This method sends the messages that previously have been queued into QueueDir .
Syntax
public void ProcessQueue(string queueDir); Async Version public async Task ProcessQueue(string queueDir); public async Task ProcessQueue(string queueDir, CancellationToken cancellationToken);
Public Sub ProcessQueue(ByVal QueueDir As String) Async Version Public Sub ProcessQueue(ByVal QueueDir As String) As Task Public Sub ProcessQueue(ByVal QueueDir As String, cancellationToken As CancellationToken) As Task
Remarks
This method sends the messages that previously have been queued into QueueDir. The PITrail event shows the interaction with the server as messages are processed.
This method looks in the directory for files with the extension ".queued" and starts processing them.
When processing starts, the file extension is changed to ".sending". If an error happens at this stage, the sending process is aborted, and the file extension is changed to ".failed".
If the file is successfully sent, the file is normally deleted, unless the KeepQueue configuration setting is set to True, in which case the file extension is instead changed to ".sent" and the queue file is not deleted.
Queue Method (SHTMLMailer Component)
This method queues the message into QueueDir .
Syntax
Remarks
This method queues the message into QueueDir. The message is queued into a unique file into the directory QueueDir for future processing.
QueueDir must already exist, or an error will be generated. Alternatively, QueueDir may be set to "*" to return the result as a string instead of writing it to a file.
This method returns the name of the unique queue file created in QueueDir. The file extension is ".queued".
Please refer to the ProcessQueue method for more information on email queue processing.
Reset Method (SHTMLMailer Component)
This method will reset the component.
Syntax
public void Reset(); Async Version public async Task Reset(); public async Task Reset(CancellationToken cancellationToken);
Public Sub Reset() Async Version Public Sub Reset() As Task Public Sub Reset(cancellationToken As CancellationToken) As Task
Remarks
This method will reset the component's properties to their default values.
ResetHeaders Method (SHTMLMailer Component)
This method resets all the message headers to empty.
Syntax
public void ResetHeaders(); Async Version public async Task ResetHeaders(); public async Task ResetHeaders(CancellationToken cancellationToken);
Public Sub ResetHeaders() Async Version Public Sub ResetHeaders() As Task Public Sub ResetHeaders(cancellationToken As CancellationToken) As Task
Remarks
This method resets all the message headers to "" (empty string). Use this method before creating a new message, so that headers from the previous message are not carried over to the next one.
Send Method (SHTMLMailer Component)
This method sends the current message and MIME-encoded attachment.
Syntax
public void Send(); Async Version public async Task Send(); public async Task Send(CancellationToken cancellationToken);
Public Sub Send() Async Version Public Sub Send() As Task Public Sub Send(cancellationToken As CancellationToken) As Task
Remarks
This method sends the current message and MIME-encoded attachment. If the component is not connected to the mail relay, a connection is created, the message is sent, and then the connection is closed unless an error occurs.
If the component is already connected (by use of the Connect method), the connection will remain open after the message is sent. To disconnect, call the Disconnect method.
Example. Send an HTML Email:
HTMLMailerControl.MailServer = "myserver"
HTMLMailerControl.SendTo = "recipient@myserver.com"
HTMLMailerControl.From = "me@myserver.com"
HTMLMailerControl.Subject = "My Subject"
HTMLMailerControl.MessageHTML = "<b>Hello</b>, my name is <i>Tom</i>"
HTMLMailerControl.Send
SendCommand Method (SHTMLMailer Component)
This method sends the exact command directly to the server.
Syntax
public void SendCommand(string command); Async Version public async Task SendCommand(string command); public async Task SendCommand(string command, CancellationToken cancellationToken);
Public Sub SendCommand(ByVal Command As String) Async Version Public Sub SendCommand(ByVal Command As String) As Task Public Sub SendCommand(ByVal Command As String, cancellationToken As CancellationToken) As Task
Remarks
This method sends the command specified by Command to the server exactly as it is provided. Use this method to send additional or custom commands directly to the server.
After calling this method, check the LastReply property or monitor the PITrail event to obtain the server's response.
SetMessageHTMLStream Method (SHTMLMailer Component)
This method sets the stream from which the component will read the HTML version of the message.
Syntax
public void SetMessageHTMLStream(System.IO.Stream messageStream); Async Version public async Task SetMessageHTMLStream(System.IO.Stream messageStream); public async Task SetMessageHTMLStream(System.IO.Stream messageStream, CancellationToken cancellationToken);
Public Sub SetMessageHTMLStream(ByVal MessageStream As System.IO.Stream) Async Version Public Sub SetMessageHTMLStream(ByVal MessageStream As System.IO.Stream) As Task Public Sub SetMessageHTMLStream(ByVal MessageStream As System.IO.Stream, cancellationToken As CancellationToken) As Task
Remarks
This method sets the stream from which the component will read the HTML version of the message. Once set, the component reads the content of the stream and populates the MessageHTML property with the HTML version of the message. The corresponding plaintext version is provided in the MessageText property.
When this property is called, the component automatically computes a plaintext version of the text and puts it into MessageText. You may choose to override this default text with your own version.
Sign Method (SHTMLMailer Component)
This method signs the current message.
Syntax
public void Sign(); Async Version public async Task Sign(); public async Task Sign(CancellationToken cancellationToken);
Public Sub Sign() Async Version Public Sub Sign() As Task Public Sub Sign(cancellationToken As CancellationToken) As Task
Remarks
This method digitally signs the input data with the certificate provided. Certificates are provided by specifying the Certificate property. The IncludeCertificate property allows you to specify whether to include the certificate when signing the message.
SignAndEncrypt Method (SHTMLMailer Component)
This method signs and encrypts the current message.
Syntax
public void SignAndEncrypt(); Async Version public async Task SignAndEncrypt(); public async Task SignAndEncrypt(CancellationToken cancellationToken);
Public Sub SignAndEncrypt() Async Version Public Sub SignAndEncrypt() As Task Public Sub SignAndEncrypt(cancellationToken As CancellationToken) As Task
Remarks
This method both signs and encrypts the input message into a single PKCS-encoded envelope.
Note: The message headers, including the Sender, Recipient(s), and Subject, are not encrypted. If this is sensitive information, consider including these headers in the message body as a MIME entity, and providing other headers for the S/MIME wrapper.
ConnectionStatus Event (SHTMLMailer Component)
Fired to indicate changes in the connection state.
Syntax
public event OnConnectionStatusHandler OnConnectionStatus; public delegate void OnConnectionStatusHandler(object sender, SHTMLMailerConnectionStatusEventArgs e); public class SHTMLMailerConnectionStatusEventArgs : EventArgs { public string ConnectionEvent { get; } public int StatusCode { get; } public string Description { get; } }
Public Event OnConnectionStatus As OnConnectionStatusHandler Public Delegate Sub OnConnectionStatusHandler(sender As Object, e As SHTMLMailerConnectionStatusEventArgs) Public Class SHTMLMailerConnectionStatusEventArgs Inherits EventArgs Public ReadOnly Property ConnectionEvent As String Public ReadOnly Property StatusCode As Integer Public ReadOnly Property Description As String End Class
Remarks
This event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.
The ConnectionEvent parameter indicates the type of connection event. Values may include the following:
| Firewall connection complete. | |
| Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable). | |
| Remote host connection complete. | |
| Remote host disconnected. | |
| SSL or S/Shell connection broken. | |
| Firewall host disconnected. |
EndTransfer Event (SHTMLMailer Component)
This event is fired when the message text completes transferring.
Syntax
public event OnEndTransferHandler OnEndTransfer; public delegate void OnEndTransferHandler(object sender, SHTMLMailerEndTransferEventArgs e); public class SHTMLMailerEndTransferEventArgs : EventArgs { public int Direction { get; } }
Public Event OnEndTransfer As OnEndTransferHandler Public Delegate Sub OnEndTransferHandler(sender As Object, e As SHTMLMailerEndTransferEventArgs) Public Class SHTMLMailerEndTransferEventArgs Inherits EventArgs Public ReadOnly Property Direction As Integer End Class
Remarks
If MessageText is not empty, the EndTransfer event is fired when the MessageText finishes transferring from the local host to the MailServer. If MessageText is empty, the event is not fired.
If a file is attached to the MessageText via the AttachedFile property, then EndTransfer fires again when the file finishes transferring. For more information, go to the description of the AttachedFile property.
The Direction parameter shows whether the client (0) or the server (1) is sending the data.
Error Event (SHTMLMailer Component)
Fired when information is available about errors during data delivery.
Syntax
public event OnErrorHandler OnError; public delegate void OnErrorHandler(object sender, SHTMLMailerErrorEventArgs e); public class SHTMLMailerErrorEventArgs : EventArgs { public int ErrorCode { get; } public string Description { get; } }
Public Event OnError As OnErrorHandler Public Delegate Sub OnErrorHandler(sender As Object, e As SHTMLMailerErrorEventArgs) Public Class SHTMLMailerErrorEventArgs Inherits EventArgs Public ReadOnly Property ErrorCode As Integer Public ReadOnly Property Description As String End Class
Remarks
The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception.
The ErrorCode parameter contains an error code, and the Description parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.
PITrail Event (SHTMLMailer Component)
This event traces the commands sent to the mail server, and the respective replies.
Syntax
public event OnPITrailHandler OnPITrail; public delegate void OnPITrailHandler(object sender, SHTMLMailerPITrailEventArgs e); public class SHTMLMailerPITrailEventArgs : EventArgs { public int Direction { get; } public string Message { get; } }
Public Event OnPITrail As OnPITrailHandler Public Delegate Sub OnPITrailHandler(sender As Object, e As SHTMLMailerPITrailEventArgs) Public Class SHTMLMailerPITrailEventArgs Inherits EventArgs Public ReadOnly Property Direction As Integer Public ReadOnly Property Message As String End Class
Remarks
The PITrail event is useful for debugging purposes. It shows all of the interaction between the client and the server, line by line, except for message header and body transfers.
The Message parameter contains the full text of the message. The Direction parameter shows the originator of the message:
| 0 (Client) | The Message originates from the client. |
| 1 (Server) | The Message originates from the server. |
| 2 (Info) | The Message is an informative message originating from the client software (the component code). |
SSLServerAuthentication Event (SHTMLMailer Component)
Fired after the server presents its certificate to the client.
Syntax
public event OnSSLServerAuthenticationHandler OnSSLServerAuthentication; public delegate void OnSSLServerAuthenticationHandler(object sender, SHTMLMailerSSLServerAuthenticationEventArgs e); public class SHTMLMailerSSLServerAuthenticationEventArgs : EventArgs { public string CertEncoded { get; }
public byte[] CertEncodedB { get; } public string CertSubject { get; } public string CertIssuer { get; } public string Status { get; } public bool Accept { get; set; } }
Public Event OnSSLServerAuthentication As OnSSLServerAuthenticationHandler Public Delegate Sub OnSSLServerAuthenticationHandler(sender As Object, e As SHTMLMailerSSLServerAuthenticationEventArgs) Public Class SHTMLMailerSSLServerAuthenticationEventArgs Inherits EventArgs Public ReadOnly Property CertEncoded As String
Public ReadOnly Property CertEncodedB As Byte() Public ReadOnly Property CertSubject As String Public ReadOnly Property CertIssuer As String Public ReadOnly Property Status As String Public Property Accept As Boolean End Class
Remarks
During this event, the client can decide whether or not to continue with the connection process. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.
When Accept is False, Status shows why the verification failed (otherwise, Status contains the string OK). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.
SSLStatus Event (SHTMLMailer Component)
Fired when secure connection progress messages are available.
Syntax
public event OnSSLStatusHandler OnSSLStatus; public delegate void OnSSLStatusHandler(object sender, SHTMLMailerSSLStatusEventArgs e); public class SHTMLMailerSSLStatusEventArgs : EventArgs { public string Message { get; } }
Public Event OnSSLStatus As OnSSLStatusHandler Public Delegate Sub OnSSLStatusHandler(sender As Object, e As SHTMLMailerSSLStatusEventArgs) Public Class SHTMLMailerSSLStatusEventArgs Inherits EventArgs Public ReadOnly Property Message As String End Class
Remarks
The event is fired for informational and logging purposes only. This event tracks the progress of the connection.
StartTransfer Event (SHTMLMailer Component)
This event is fired when the message text starts transferring.
Syntax
public event OnStartTransferHandler OnStartTransfer; public delegate void OnStartTransferHandler(object sender, SHTMLMailerStartTransferEventArgs e); public class SHTMLMailerStartTransferEventArgs : EventArgs { public int Direction { get; } }
Public Event OnStartTransfer As OnStartTransferHandler Public Delegate Sub OnStartTransferHandler(sender As Object, e As SHTMLMailerStartTransferEventArgs) Public Class SHTMLMailerStartTransferEventArgs Inherits EventArgs Public ReadOnly Property Direction As Integer End Class
Remarks
If MessageText is not empty, the StartTransfer event is fired when the MessageText starts transferring from the local host to the MailServer. If MessageText is empty, the event is not fired.
If a file is attached to the MessageText via the AttachedFile property, then StartTransfer fires again when the file starts transferring. Please go to the description of the AttachedFile property for more information.
The Direction parameter shows whether the client (0) or the server (1) is sending the data.
Transfer Event (SHTMLMailer Component)
This event is fired when the message text is transferred to MailServer .
Syntax
public event OnTransferHandler OnTransfer; public delegate void OnTransferHandler(object sender, SHTMLMailerTransferEventArgs e); public class SHTMLMailerTransferEventArgs : EventArgs { public int Direction { get; } public long BytesTransferred { get; } public int PercentDone { get; } public string Text { get; }
public byte[] TextB { get; } }
Public Event OnTransfer As OnTransferHandler Public Delegate Sub OnTransferHandler(sender As Object, e As SHTMLMailerTransferEventArgs) Public Class SHTMLMailerTransferEventArgs Inherits EventArgs Public ReadOnly Property Direction As Integer Public ReadOnly Property BytesTransferred As Long Public ReadOnly Property PercentDone As Integer Public ReadOnly Property Text As String
Public ReadOnly Property TextB As Byte() End Class
Remarks
One or more Transfer events are fired during message delivery. Messages consist of MessageText and an optional AttachedFile. The BytesTransferred parameter shows the number of bytes sent starting from the beginning of MessageText or AttachedFile.
Text contains the current portion of the message being sent.
The Direction parameter shows whether the client (0) or the server (1) is sending the data.
The PercentDone parameter shows the progress of the transfer in the corresponding direction. If PercentDone can not be calculated the value will be -1.
Note: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.
Certificate Type
This is the digital certificate being used.
Remarks
This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.
Fields
EffectiveDate
string (read-only)
Default: ""
The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:
23-Jan-2000 15:00:00.
ExpirationDate
string (read-only)
Default: ""
The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:
23-Jan-2001 15:00:00.
ExtendedKeyUsage
string (read-only)
Default: ""
A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).
Fingerprint
string (read-only)
Default: ""
The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02
FingerprintSHA1
string (read-only)
Default: ""
The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84
FingerprintSHA256
string (read-only)
Default: ""
The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.
The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53
Issuer
string (read-only)
Default: ""
The issuer of the certificate. This field contains a string representation of the name of the issuing authority for the certificate.
PrivateKey
string (read-only)
Default: ""
The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.
Note: The PrivateKey may be available but not exportable. In this case, PrivateKey returns an empty string.
PrivateKeyAvailable
bool (read-only)
Default: False
Whether a PrivateKey is available for the selected certificate. If PrivateKeyAvailable is True, the certificate may be used for authentication purposes (e.g., server authentication).
PrivateKeyContainer
string (read-only)
Default: ""
The name of the PrivateKey container for the certificate (if available). This functionality is available only on Windows platforms.
PublicKey
string (read-only)
Default: ""
The public key of the certificate. The key is provided as PEM/Base64-encoded data.
PublicKeyAlgorithm
string (read-only)
Default: ""
The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.
PublicKeyLength
int (read-only)
Default: 0
The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.
SerialNumber
string (read-only)
Default: ""
The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.
SignatureAlgorithm
string (read-only)
Default: ""
The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.
Store
string
Default: "MY"
The name of the certificate store for the client certificate.
The StoreType field denotes the type of the certificate store specified by Store. If the store is password-protected, specify the password in StorePassword.
Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject field for details.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
StoreB
byte []
Default: "MY"
The name of the certificate store for the client certificate.
The StoreType field denotes the type of the certificate store specified by Store. If the store is password-protected, specify the password in StorePassword.
Store is used in conjunction with the Subject field to specify client certificates. If Store has a value, and Subject or Encoded is set, a search for a certificate is initiated. Please see the Subject field for details.
Designations of certificate stores are platform dependent.
The following designations are the most common User and Machine certificate stores in Windows:
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |
When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).
StorePassword
string
Default: ""
If the type of certificate store requires a password, this field is used to specify the password needed to open the certificate store.
StoreType
CertStoreTypes
Default: 0
The type of certificate store for this certificate.
The component supports both public and private keys in a variety of formats. When the cstAuto value is used, the component will automatically determine the type. This field can take one of the following values:
| 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user.
Note: This store type is not available in Java. |
| 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store.
Note: This store type is not available in Java. |
| 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
| 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
| 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates.
Note: This store type is only available in Java. |
| 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format.
Note: This store type is only available in Java. |
| 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
| 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
| 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
| 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
| 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
| 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
| 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
| 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
| 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
| 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
| 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
| 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store).
Note: This store type is only available in Java and .NET. |
| 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format.
Note: This store type is only available in Java and .NET. |
| 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface.
To use a security key, the necessary data must first be collected using the CertMgr component. The ListStoreCertificates method may be called after setting CertStoreType to cstPKCS11, CertStorePassword to the PIN, and CertStore to the full path of the PKCS#11 DLL. The certificate information returned in the CertList event's CertEncoded parameter may be saved for later use. When using a certificate, pass the previously saved security key information as the Store and set StorePassword to the PIN. Code Example. SSH Authentication with Security Key:
|
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |
SubjectAltNames
string (read-only)
Default: ""
Comma-separated lists of alternative subject names for the certificate.
ThumbprintMD5
string (read-only)
Default: ""
The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
ThumbprintSHA1
string (read-only)
Default: ""
The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
ThumbprintSHA256
string (read-only)
Default: ""
The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.
Usage
string (read-only)
Default: ""
The text description of UsageFlags.
This value will be one or more of the following strings and will be separated by commas:
- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only
If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.
UsageFlags
int (read-only)
Default: 0
The flags that show intended use for the certificate. The value of UsageFlags is a combination of the following flags:
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |
Please see the Usage field for a text representation of UsageFlags.
This functionality currently is not available when the provider is OpenSSL.
Version
string (read-only)
Default: ""
The certificate's version number. The possible values are the strings "V1", "V2", and "V3".
Subject
string
Default: ""
The subject of the certificate used for client authentication.
This field will be populated with the full subject of the loaded certificate. When loading a certificate, the subject is used to locate the certificate in the store.
If an exact match is not found, the store is searched for subjects containing the value of the property.
If a match is still not found, the property is set to an empty string, and no certificate is selected.
The special value "*" picks a random certificate in the certificate store.
The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:
| Field | Meaning |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |
If a field value contains a comma, it must be quoted.
Encoded
string
Default: ""
The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The Store and Subject fields also may be used to specify a certificate.
When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.
EncodedB
byte []
Default: ""
The certificate (PEM/Base64 encoded). This field is used to assign a specific certificate. The Store and Subject fields also may be used to specify a certificate.
When Encoded is set, a search is initiated in the current Store for the private key of the certificate. If the key is found, Subject is updated to reflect the full subject of the selected certificate; otherwise, Subject is set to an empty string.
Constructors
public Certificate();
Public Certificate()
Creates a instance whose properties can be set. This is useful for use with when generating new certificates.
public Certificate(string certificateFile);
Public Certificate(ByVal CertificateFile As String)
Opens CertificateFile and reads out the contents as an X.509 public key.
public Certificate(byte[] encoded);
Public Certificate(ByVal Encoded As Byte())
Parses Encoded as an X.509 public key.
public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject);
Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Subject As String)
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
public Certificate(CertStoreTypes storeType, string store, string storePassword, string subject, string configurationString);
Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Subject As String, ByVal ConfigurationString As String)
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store.
ConfigurationString is a newline-separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CryptoAPI option. The default value is True (the key is persisted). "Thumbprint" - an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to the cstUser , cstMachine , cstPublicKeyFile , and cstPFXFile store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
public Certificate(CertStoreTypes storeType, string store, string storePassword, byte[] encoded);
Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Encoded As Byte())
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will load Encoded as an X.509 certificate and search the opened store for a corresponding private key.
public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject);
Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As Byte(), ByVal StorePassword As String, ByVal Subject As String)
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a byte array containing the certificate data. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, string subject, string configurationString);
Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As Byte(), ByVal StorePassword As String, ByVal Subject As String, ByVal ConfigurationString As String)
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a byte array containing the certificate data. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X.509 certificate's subject Distinguished Name (DN). The Subject parameter can also take an MD5, SHA-1, or SHA-256 thumbprint of the certificate to load in a "Thumbprint=value" format.
public Certificate(CertStoreTypes storeType, byte[] store, string storePassword, byte[] encoded);
Public Certificate(ByVal StoreType As CertStoreTypes, ByVal Store As Byte(), ByVal StorePassword As String, ByVal Encoded As Byte())
StoreType identifies the type of certificate store to use. See for descriptions of the different certificate stores. Store is a byte array containing the certificate data. StorePassword is the password used to protect the store.
After the store has been successfully opened, the component will load Encoded as an X.509 certificate and search the opened store for a corresponding private key.
FileAttachment Type
This describes the file being attached.
Remarks
This contains information about the location of the file that is being attached to the message.
Fields
Data
string
Default: ""
The raw data for the attachment that will be sent with your message. This field is used if InputStream and File are not set.
DataB
byte []
Default: ""
The raw data for the attachment that will be sent with your message. This field is used if InputStream and File are not set.
FileName
string
Default: ""
This field contains the path of a file on your system to be sent as an attachment with your message. Not used if InputStream is set.
InputStream
System.IO.Stream
Default: ""
When this field is set to a valid stream, the component will attach the data from the stream as the current attachment.
Name
string
Default: ""
This field contains the name of the attachment to be sent.
Constructors
public FileAttachment();
Public FileAttachment()
public FileAttachment(string fileName);
Public FileAttachment(ByVal FileName As String)
public FileAttachment(string name, string fileName);
Public FileAttachment(ByVal Name As String, ByVal FileName As String)
public FileAttachment(string name, System.IO.Stream inputStream);
Public FileAttachment(ByVal Name As String, ByVal InputStream As System.IO.Stream)
public FileAttachment(string name, System.IO.Stream inputStream, string encoding);
Public FileAttachment(ByVal Name As String, ByVal InputStream As System.IO.Stream, ByVal Encoding As String)
Firewall Type
The firewall the component will connect through.
Remarks
When connecting through a firewall, this type is used to specify different properties of the firewall, such as the firewall Host and the FirewallType.
Fields
AutoDetect
bool
Default: False
Whether to automatically detect and use firewall system settings, if available.
FirewallType
FirewallTypes
Default: 0
The type of firewall to connect through. The applicable values are as follows:
| fwNone (0) | No firewall (default setting). |
| fwTunnel (1) | Connect through a tunneling proxy. Port is set to 80. |
| fwSOCKS4 (2) | Connect through a SOCKS4 Proxy. Port is set to 1080. |
| fwSOCKS5 (3) | Connect through a SOCKS5 Proxy. Port is set to 1080. |
| fwSOCKS4A (10) | Connect through a SOCKS4A Proxy. Port is set to 1080. |
Host
string
Default: ""
The name or IP address of the firewall (optional). If a Host is given, the requested connections will be authenticated through the specified firewall when connecting.
If this field is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this field is set to the corresponding address. If the search is not successful, the component throws an exception.
Password
string
Default: ""
A password if authentication is to be used when connecting through the firewall. If Host is specified, the User and Password fields are used to connect and authenticate to the given firewall. If the authentication fails, the component throws an exception.
Port
int
Default: 0
The Transmission Control Protocol (TCP) port for the firewall Host. See the description of the Host field for details.
Note: This field is set automatically when FirewallType is set to a valid value. See the description of the FirewallType field for details.
User
string
Default: ""
A username if authentication is to be used when connecting through a firewall. If Host is specified, this field and the Password field are used to connect and authenticate to the given Firewall. If the authentication fails, the component throws an exception.
Constructors
HTMLImage Type
This type describes an HTML-embedded image.
Remarks
Each image in the HTML message gets set when the MessageHTML property is set. You may, however, make changes to the fields for each HTMLImage before the message is sent.
Fields
Data
string
Default: ""
This field optionally specifies the image data. This may be used instead of specifying an image by file. The value specified here may be either the hex-encoded image data or the raw unencoded image data.
DataB
byte []
Default: ""
This field optionally specifies the image data. This may be used instead of specifying an image by file. The value specified here may be either the hex-encoded image data or the raw unencoded image data.
File
string
Default: ""
This field contains the name of the image files embedded into the HTML message. This value is updated every time MessageHTML is set. You may change the file names before sending (e.g., if they don't point to valid files).
Id
string
Default: ""
This field contains the content identifier for embedded images. This value is computed automatically, unless ParseHTML is False, in which case you are responsible for providing it.
ImageType
string
Default: ""
This field contains the content type for embedded images. This value is determined automatically, unless ParseHTML is False, in which case you are responsible for providing it.
Constructors
MessageRecipient Type
This types describes the message recipient.
Remarks
This type describes who the message is sent to. It includes fields to denote the name and email address of the recipient of the message. The type of recipient must also be specified if the component is sending the message.
Fields
Address
string
Default: ""
This field contains the email address of the recipient.
Name
string
Default: ""
This field contains the name of the recipient.
Options
string
Default: ""
This field contains the recipient sending options (used only by SMTP). This must be a string of RFC-compliant recipient options (used by SMTP).
One type of option is a delivery status notification sent per recipient, which is specified by RFC 1891.
component.MessageRecipients(0).Options = "NOTIFY SUCCESS,FAILURE,DELAY";
RecipientType
EmailRecipientTypes
Default: 0
This field contains the recipient type: To, Cc, or Bcc.
Constructors
public MessageRecipient();
Public MessageRecipient()
public MessageRecipient(string address);
Public MessageRecipient(ByVal Address As String)
public MessageRecipient(string address, int recipientType);
Public MessageRecipient(ByVal Address As String, ByVal RecipientType As Integer)
Config Settings (SHTMLMailer Component)
The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.HTMLMailer Config Settings
| 0 | 7-bit |
| 1 | Quoted-Printable |
| 2 | Base64 |
| 3 | 8-bit |
| 0 | 7-bit |
| 1 | Quoted-Printable |
| 2 | Base64 |
| 3 | 8-bit |
Note: Be aware of security considerations when using this configuration.
Note: Be aware of security considerations when using this configuration.
SMTP Config Settings
Bearer ya29.AHES6ZRmS-8xPbpGetC1VbABJIBRdKm-c4X7wMVGAbgxdGt5q8Ts3Q
Note: When using amXOAUTH2, User must be specified, but Password is not required.
Note: This is True by default.
If AllowExtensions is True, the EHLO command will be sent instead of the HELO command.
It is generally a good idea to use a MaxHeaderLength of less than 100 bytes, although different mail relays and mail servers have different requirements for header lengths.
Example:
smtp1.Send();
string rawMsg = smtp1.Config("MessageHeadersString") + smtp1.Config("TransferText");
Possible values are as follows:
- "MD5"
- "SHA1" (default)
- "SHA256"
Example:
smtp1.Send();
string rawMsg = smtp1.Config("MessageHeadersString") + smtp1.Config("TransferText");
TCPClient Config Settings
If the FirewallHost setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the FirewallHost setting is set to the corresponding address. If the search is not successful, an error is returned.
Note: This setting is provided for use by components that do not directly expose Firewall properties.
If this entry is set, the component acts as a server. RemoteHost and RemotePort are used to tell the SOCKS firewall in which address and port to listen to. The firewall rules may ignore RemoteHost, and it is recommended that RemoteHost be set to empty string in this case.
RemotePort is the port in which the firewall will listen to. If set to 0, the firewall will select a random port. The binding (address and port) is provided through the ConnectionStatus event.
The connection to the firewall is made by calling the Connect method.
Note: This setting is provided for use by components that do not directly expose Firewall properties.
Note: This configuration setting is provided for use by components that do not directly expose Firewall properties.
| 0 | No firewall (default setting). |
| 1 | Connect through a tunneling proxy. FirewallPort is set to 80. |
| 2 | Connect through a SOCKS4 Proxy. FirewallPort is set to 1080. |
| 3 | Connect through a SOCKS5 Proxy. FirewallPort is set to 1080. |
| 10 | Connect through a SOCKS4A Proxy. FirewallPort is set to 1080. |
Note: This setting is provided for use by components that do not directly expose Firewall properties.
Note: This setting is provided for use by components that do not directly expose Firewall properties.
Note: This value is not applicable in macOS.
In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if LingerTime is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires.
In the second scenario, if LingerTime is a positive value, the system will attempt to send pending data until the specified LingerTime is reached. If this attempt fails, then the system will reset the connection.
The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the component returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes).
Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action.
In multihomed hosts (machines with more than one IP interface), setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface.
If the component is connected, the LocalHost setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).
Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established.
LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.
This configuration setting is useful when trying to connect to services that require a trusted port on the client side. An example is the remote shell (rsh) service in UNIX systems.
If an EOL string is found in the input stream before MaxLineLength bytes are received, the DataIn event is fired with the EOL parameter set to True, and the buffer is reset.
If no EOL is found, and MaxLineLength bytes are accumulated in the buffer, the DataIn event is fired with the EOL parameter set to False, and the buffer is reset.
The minimum value for MaxLineLength is 256 bytes. The default value is 2048 bytes.
www.google.com;www.nsoftware.com
Note: This value is not applicable in Java.
By default, this configuration setting is set to False.
| 0 | IPv4 only |
| 1 | IPv6 only |
| 2 | IPv6 with IPv4 fallback |
SSL Config Settings
The value is formatted as a list of paths separated by semicolons. The component will check for the existence of each file in the order specified. When a file is found, the CA certificates within the file will be loaded and used to determine the validity of server or client certificates.
The default value is as follows:
/etc/ssl/ca-bundle.pem;/etc/pki/tls/certs/ca-bundle.crt;/etc/ssl/certs/ca-certificates.crt;/etc/pki/tls/cacert.pem
When enabled, SSL packet logs are output using the SSLStatus event, which will fire each time an SSL packet is sent or received.
Enabling this configuration setting has no effect if SSLProvider is set to Platform.
If set to True, the component will reuse the context if and only if the following criteria are met:
- The target host name is the same.
- The system cache entry has not expired (default timeout is 10 hours).
- The application process that calls the function is the same.
- The logon session is the same.
- The instance of the component is the same.
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
When set to 0 (default), the CRL check will not be performed by the component. When set to 1, it will attempt to perform the CRL check, but it will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.
This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.
When set to 0 (default), the component will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but it will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported.
This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.
Note: This configuration setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the SSLStatus event.
Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.
When the provider is OpenSSL, SSLCipherStrength is currently not supported. This functionality is instead made available through the OpenSSLCipherList configuration setting.
The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert ... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert ... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
By default, the enabled cipher suites will include all available ciphers ("*").
The special value "*" means that the component will pick all of the supported cipher suites. If SSLEnabledCipherSuites is set to any other value, only the specified cipher suites will be considered.
Multiple cipher suites are separated by semicolons.
Example values when SSLProvider is set to Platform include the following:
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=CALG_AES_256");
obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES");
Possible values when SSLProvider is set to Platform include the following:
- CALG_3DES
- CALG_3DES_112
- CALG_AES
- CALG_AES_128
- CALG_AES_192
- CALG_AES_256
- CALG_AGREEDKEY_ANY
- CALG_CYLINK_MEK
- CALG_DES
- CALG_DESX
- CALG_DH_EPHEM
- CALG_DH_SF
- CALG_DSS_SIGN
- CALG_ECDH
- CALG_ECDH_EPHEM
- CALG_ECDSA
- CALG_ECMQV
- CALG_HASH_REPLACE_OWF
- CALG_HUGHES_MD5
- CALG_HMAC
- CALG_KEA_KEYX
- CALG_MAC
- CALG_MD2
- CALG_MD4
- CALG_MD5
- CALG_NO_SIGN
- CALG_OID_INFO_CNG_ONLY
- CALG_OID_INFO_PARAMETERS
- CALG_PCT1_MASTER
- CALG_RC2
- CALG_RC4
- CALG_RC5
- CALG_RSA_KEYX
- CALG_RSA_SIGN
- CALG_SCHANNEL_ENC_KEY
- CALG_SCHANNEL_MAC_KEY
- CALG_SCHANNEL_MASTER_HASH
- CALG_SEAL
- CALG_SHA
- CALG_SHA1
- CALG_SHA_256
- CALG_SHA_384
- CALG_SHA_512
- CALG_SKIPJACK
- CALG_SSL2_MASTER
- CALG_SSL3_MASTER
- CALG_SSL3_SHAMD5
- CALG_TEK
- CALG_TLS1_MASTER
- CALG_TLS1PRF
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA");
Possible values when SSLProvider is set to Internal include the following:
- TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA
- TLS_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_DES_CBC_SHA
- TLS_DHE_RSA_WITH_DES_CBC_SHA
- TLS_DHE_DSS_WITH_DES_CBC_SHA
- TLS_RSA_WITH_RC4_128_MD5
- TLS_RSA_WITH_RC4_128_SHA
When TLS 1.3 is negotiated (see SSLEnabledProtocols), only the following cipher suites are supported:
- TLS_AES_256_GCM_SHA384
- TLS_CHACHA20_POLY1305_SHA256
- TLS_AES_128_GCM_SHA256
SSLEnabledCipherSuites is used together with SSLCipherStrength.
Not all supported protocols are enabled by default. The default value is 4032 for client components, and 3072 for server components. To specify a combination of enabled protocol versions set this config to the binary OR of one or more of the following values:
| TLS1.3 | 12288 (Hex 3000) |
| TLS1.2 | 3072 (Hex C00) (Default - Client and Server) |
| TLS1.1 | 768 (Hex 300) (Default - Client) |
| TLS1 | 192 (Hex C0) (Default - Client) |
| SSL3 | 48 (Hex 30) |
| SSL2 | 12 (Hex 0C) |
Note that only TLS 1.2 is enabled for server components that accept incoming connections. This adheres to industry standards to ensure a secure connection. Client components enable TLS 1.0, TLS 1.1, and TLS 1.2 by default and will negotiate the highest mutually supported version when connecting to a server, which should be TLS 1.2 in most cases.
SSLEnabledProtocols: Transport Layer Security (TLS) 1.3 Notes:
By default when TLS 1.3 is enabled, the component will use the internal TLS implementation when the SSLProvider is set to Automatic for all editions.
In editions that are designed to run on Windows, SSLProvider can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is supported only on Windows 11/Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version.
If set to 1 (Platform provider), please be aware of the following notes:
- The platform provider is available only on Windows 11/Windows Server 2022 and up.
- SSLEnabledCipherSuites and other similar SSL configuration settings are not supported.
- If SSLEnabledProtocols includes both TLS 1.3 and TLS 1.2, these restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions.
SSLEnabledProtocols: SSL2 and SSL3 Notes:
SSL 2.0 and 3.0 are not supported by the component when the SSLProvider is set to internal. To use SSL 2.0 or SSL 3.0, the platform security API must have the protocols enabled and SSLProvider needs to be set to platform.
This configuration setting is applicable only when SSLProvider is set to Internal.
If set to True, all certificates returned by the server will be present in the Encoded parameter of the SSLServerAuthentication event. This includes the leaf certificate, any intermediate certificate, and the root certificate.
Note: When SSLProvider is set to Internal this value is automatically set to true. This is needed for proper validation when using the internal provider.
When set, the component will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools, such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffic for debugging purposes. When writing to this file, the component will only append, it will not overwrite previous values.
Note: This configuration setting is applicable only when SSLProvider is set to Internal.
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipher[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipherStrength[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedCipherSuite[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedKeyExchange[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedKeyExchangeStrength[connId]");
Note: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:
server.Config("SSLNegotiatedVersion[connId]");
| 0x00000001 | Ignore time validity status of certificate. |
| 0x00000002 | Ignore time validity status of CTL. |
| 0x00000004 | Ignore non-nested certificate times. |
| 0x00000010 | Allow unknown certificate authority. |
| 0x00000020 | Ignore wrong certificate usage. |
| 0x00000100 | Ignore unknown certificate revocation status. |
| 0x00000200 | Ignore unknown CTL signer revocation status. |
| 0x00000400 | Ignore unknown certificate authority revocation status. |
| 0x00000800 | Ignore unknown root revocation status. |
| 0x00008000 | Allow test root certificate. |
| 0x00004000 | Trust test root certificate. |
| 0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). |
This functionality is currently not available in Java or when the provider is OpenSSL.
The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:
-----BEGIN CERTIFICATE----- MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw ... Intermediate Cert... eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w F0I1XhM+pKj7FjDr+XNj -----END CERTIFICATE----- \r \n -----BEGIN CERTIFICATE----- MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp ... Root Cert... d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA -----END CERTIFICATE-----
When specified the component will verify that the server certificate signature algorithm is among the values specified in this configuration setting. If the server certificate signature algorithm is unsupported, the component throws an exception.
The format of this value is a comma-separated list of hash-signature combinations. For instance:
component.SSLProvider = TCPClientSSLProviders.sslpInternal;
component.Config("SSLEnabledProtocols=3072"); //TLS 1.2
component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa");
The default value for this configuration setting is sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa.
To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.
The default value is ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1.
When using TLS 1.2 and SSLProvider is set to Internal, the values refer to the supported groups for ECC. The following values are supported:
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)
The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result, only some groups are included by default in this configuration setting.
Note: All supported groups can always be used during the handshake even if not listed here, but if a group is used that is not present in this list, it will incur an additional roundtrip and time to generate the key share for that group.
In most cases, this configuration setting does not need to be modified. This should be modified only if there is a specific reason to do so.
The default value is ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072
The values are ordered from most preferred to least preferred. The following values are supported:
- "ecdhe_x25519" (default)
- "ecdhe_x448"
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1"
- "ffdhe_2048" (default)
- "ffdhe_3072" (default)
- "ffdhe_4096"
- "ffdhe_6144"
- "ffdhe_8192"
- "ed25519" (default)
- "ed448" (default)
- "ecdsa_secp256r1_sha256" (default)
- "ecdsa_secp384r1_sha384" (default)
- "ecdsa_secp521r1_sha512" (default)
- "rsa_pkcs1_sha256" (default)
- "rsa_pkcs1_sha384" (default)
- "rsa_pkcs1_sha512" (default)
- "rsa_pss_sha256" (default)
- "rsa_pss_sha384" (default)
- "rsa_pss_sha512" (default)
The default value is ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192
The values are ordered from most preferred to least preferred. The following values are supported:
- "ecdhe_x25519" (default)
- "ecdhe_x448" (default)
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)
- "ffdhe_2048" (default)
- "ffdhe_3072" (default)
- "ffdhe_4096" (default)
- "ffdhe_6144" (default)
- "ffdhe_8192" (default)
Socket Config Settings
Note: This option is not valid for User Datagram Protocol (UDP) ports.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the component is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.
Base Config Settings
In some non-GUI applications, an invalid message loop may be discovered that will result in errant behavior. In these cases, setting GUIAvailable to false will ensure that the component does not attempt to process external events.
- Product: The product the license is for.
- Product Key: The key the license was generated from.
- License Source: Where the license was found (e.g., RuntimeLicense, License File).
- License Type: The type of license installed (e.g., Royalty Free, Single Server).
- Last Valid Build: The last valid build number for which the license will work.
This setting only works on these components: AS3Receiver, AS3Sender, Atom, Client(3DS), FTP, FTPServer, IMAP, OFTPClient, SSHClient, SCP, Server(3DS), Sexec, SFTP, SFTPServer, SSHServer, TCPClient, TCPServer.
Setting this configuration setting to true tells the component to use the internal implementation instead of using the system security libraries.
On Windows, this setting is set to false by default. On Linux/macOS, this setting is set to true by default.
If using the .NET Standard Library, this setting will be true on all platforms. The .NET Standard library does not support using the system security libraries.
Note: This setting is static. The value set is applicable to all components used in the application.
When this value is set, the product's system dynamic link library (DLL) is no longer required as a reference, as all unmanaged code is stored in that file.
Trappable Errors (SHTMLMailer Component)
HTMLMailer Errors
| 169 | Invalid image index (out of range). |
| 170 | Invalid attachment index (out of range). |
The component may also return one of the following error codes, which are inherited from other components.
MIME Errors
| 3 | Can't create the file for write (illegal name or disk is write-protected). |
| 4 | Can't open the file for read (doesn't exist?). |
| 5 | Can't read from file. |
| 6 | Can't write to file (disk full?). |
| 280 | Invalid Part Index. |
| 281 | Unknown MIME type. |
| 282 | No MIME-boundary found. |
| 283 | No file given. |
| 284 | The component is busy. |
| 285 | Can't create a temporary file to decode the data. |
| 286 | Can't read Message file. |
| 287 | No header separator found. |
| 289 | No separator found. |
| 290 | Input stream must have seeking enabled. |
SMTP Errors
| 118 | Firewall Error. Error message contains detailed description. |
| 161 | SMTP protocol error. Description contains the server reply. |
| 162 | Error communicating with server. Error text is attached. |
| 163 | Please specify a MailServer. |
| 164 | Please specify a sender (From). |
| 165 | Please specify a recipient. |
| 166 | Busy executing current method. |
| 301 | Operation interrupted. |
| 302 | Cannot open AttachedFile. |
The component may also return one of the following error codes, which are inherited from other components.
TCPClient Errors
| 100 | You cannot change the RemotePort at this time. A connection is in progress. |
| 101 | You cannot change the RemoteHost (Server) at this time. A connection is in progress. |
| 102 | The RemoteHost address is invalid (0.0.0.0). |
| 104 | Already connected. If you want to reconnect, close the current connection first. |
| 106 | You cannot change the LocalPort at this time. A connection is in progress. |
| 107 | You cannot change the LocalHost at this time. A connection is in progress. |
| 112 | You cannot change MaxLineLength at this time. A connection is in progress. |
| 116 | RemotePort cannot be zero. Please specify a valid service port number. |
| 117 | You cannot change the UseConnection option while the component is active. |
| 135 | Operation would block. |
| 201 | Timeout. |
| 211 | Action impossible in control's present state. |
| 212 | Action impossible while not connected. |
| 213 | Action impossible while listening. |
| 301 | Timeout. |
| 303 | Could not open file. |
| 434 | Unable to convert string to selected CodePage. |
| 1105 | Already connecting. If you want to reconnect, close the current connection first. |
| 1117 | You need to connect first. |
| 1119 | You cannot change the LocalHost at this time. A connection is in progress. |
| 1120 | Connection dropped by remote host. |
SSL Errors
| 270 | Cannot load specified security library. |
| 271 | Cannot open certificate store. |
| 272 | Cannot find specified certificate. |
| 273 | Cannot acquire security credentials. |
| 274 | Cannot find certificate chain. |
| 275 | Cannot verify certificate chain. |
| 276 | Error during handshake. |
| 280 | Error verifying certificate. |
| 281 | Could not find client certificate. |
| 282 | Could not find server certificate. |
| 283 | Error encrypting data. |
| 284 | Error decrypting data. |
TCP/IP Errors
| 10004 | [10004] Interrupted system call. |
| 10009 | [10009] Bad file number. |
| 10013 | [10013] Access denied. |
| 10014 | [10014] Bad address. |
| 10022 | [10022] Invalid argument. |
| 10024 | [10024] Too many open files. |
| 10035 | [10035] Operation would block. |
| 10036 | [10036] Operation now in progress. |
| 10037 | [10037] Operation already in progress. |
| 10038 | [10038] Socket operation on nonsocket. |
| 10039 | [10039] Destination address required. |
| 10040 | [10040] Message is too long. |
| 10041 | [10041] Protocol wrong type for socket. |
| 10042 | [10042] Bad protocol option. |
| 10043 | [10043] Protocol is not supported. |
| 10044 | [10044] Socket type is not supported. |
| 10045 | [10045] Operation is not supported on socket. |
| 10046 | [10046] Protocol family is not supported. |
| 10047 | [10047] Address family is not supported by protocol family. |
| 10048 | [10048] Address already in use. |
| 10049 | [10049] Cannot assign requested address. |
| 10050 | [10050] Network is down. |
| 10051 | [10051] Network is unreachable. |
| 10052 | [10052] Net dropped connection or reset. |
| 10053 | [10053] Software caused connection abort. |
| 10054 | [10054] Connection reset by peer. |
| 10055 | [10055] No buffer space available. |
| 10056 | [10056] Socket is already connected. |
| 10057 | [10057] Socket is not connected. |
| 10058 | [10058] Cannot send after socket shutdown. |
| 10059 | [10059] Too many references, cannot splice. |
| 10060 | [10060] Connection timed out. |
| 10061 | [10061] Connection refused. |
| 10062 | [10062] Too many levels of symbolic links. |
| 10063 | [10063] File name is too long. |
| 10064 | [10064] Host is down. |
| 10065 | [10065] No route to host. |
| 10066 | [10066] Directory is not empty |
| 10067 | [10067] Too many processes. |
| 10068 | [10068] Too many users. |
| 10069 | [10069] Disc Quota Exceeded. |
| 10070 | [10070] Stale NFS file handle. |
| 10071 | [10071] Too many levels of remote in path. |
| 10091 | [10091] Network subsystem is unavailable. |
| 10092 | [10092] WINSOCK DLL Version out of range. |
| 10093 | [10093] Winsock is not loaded yet. |
| 11001 | [11001] Host not found. |
| 11002 | [11002] Nonauthoritative 'Host not found' (try again or check DNS setup). |
| 11003 | [11003] Nonrecoverable errors: FORMERR, REFUSED, NOTIMP. |
| 11004 | [11004] Valid name, no data record (check DNS setup). |