SSMTP Class

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The SSMTP Class is used to send Internet mail using the SMTP protocol (the Internet mail standard).

Syntax

ipworkssmime.Ssmtp

Remarks

The SSMTP Class is the S/MIME enabled equivalent of the IPWorks SMTP Class. In addition to standard SMTP functions the SSMTP class can sign and/or encrypt messages in a PKCS envelope. The methods and properties for encrypting and signing are identical to those provided with the S/MIME Class. After setting the certificate properties, and specifying MessageText, call the Encrypt, Sign or SignAndEncrypt method before sending and the result will be stored in MessageText.

The SSMTP Class implements a standard SMTP client as specified in RFC 821. It has a simple plug-and-play interface. It contains a number of properties like SendTo, Subject, From, Cc, BCc, etc. that map directly to the internet mail message headers with the same name (RFC 822). The message text is set in MessageText. Messages are sent by calling the Send method.

The class supports message delivery to multiple recipients through the SendTo, Cc, and BCc properties. Simply specify the destination email addresses separated by commas.

The interface of the class is open-ended. New features, including MIME attachments can be supported by using the OtherHeaders property.

A number of events provide feedback during the operation of the class. The Transfer event is fired during message delivery to show the number of bytes delivered. The PITrail event traces the commands that are sent to the server and the respective replies.

Property List

The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the class with short descriptions. Click on the links for further details.

AllowExtensions Property (SSMTP Class)

This property is a switch allowing the class to use ESMTP features (Extended SMTP).

Syntax

public boolean isAllowExtensions();


public void setAllowExtensions(boolean allowExtensions);

Default Value

True

Remarks

This property is a switch allowing the class to use ESMTP features (Extended SMTP). If this property is True, the class will first send the EHLO greeting (Extended Hello) to the server and, if that fails, the standard HELO command will be sent.

This property is True by default but may be disabled if it is known in advance that the MailServer does not support SMTP extensions.

This property is not available at design time.

AuthMechanism Property (SSMTP Class)

This property is used when connecting to the mail server.

Syntax

public int getAuthMechanism();


public void setAuthMechanism(int authMechanism);


Enumerated values:
  public final static int amUserPassword = 0;
  public final static int amCRAMMD5 = 1;
  public final static int amNTLM = 2;
  public final static int amAPOP = 3;
  public final static int amSASLPlain = 4;
  public final static int amSASLDigestMD5 = 5;
  public final static int amKerberos = 6;
  public final static int amXOAUTH2 = 7;

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 (SSMTP Class)

This property includes a comma-separated list of addresses for blind carbon copies (optional).

Syntax

public String getBCc();


public void setBCc(String BCc);

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 class 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 (SSMTP Class)

This property includes a comma-separated list of addresses for carbon copies (optional).

Syntax

public String getCc();


public void setCc(String cc);

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 class 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 (SSMTP Class)

This property includes the current selected certificate.

Syntax

public Certificate getCertificate();


public void setCertificate(Certificate certificate);

Remarks

This property is populated when a specified certificate is found or loaded by the class. 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.

Command Property (SSMTP Class)

This property is used to send additional commands directly to the server.

Syntax

public void setCommand(String command);

Default Value

""

Remarks

This property can be used to send additional commands directly to the server. Check the LastReply property or trap the PITrail events coming from the server to get the response.

This property is write-only and not available at design time.

Connected Property (SSMTP Class)

This shows whether the class is connected.

Syntax

public boolean isConnected();


public void setConnected(boolean connected);

Default Value

False

Remarks

This property is used to determine whether or not the class is connected to the remote host.

Note: It is recommended to use the Connect or Disconnect method instead of setting this property.

This property is not available at design time.

DeliveryNotificationTo Property (SSMTP Class)

This property includes the email address to which to send a delivery notification.

Syntax

public String getDeliveryNotificationTo();


public void setDeliveryNotificationTo(String deliveryNotificationTo);

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 (SSMTP Class)

The property includes textual description of the encrypting algorithm.

Syntax

public String getEncryptingAlgorithm();


public void setEncryptingAlgorithm(String encryptingAlgorithm);

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 (SSMTP Class)

A set of properties related to firewall access.

Syntax

public Firewall getFirewall();


public void setFirewall(Firewall firewall);

Remarks

This is a Firewall type property which contains fields describing the firewall through which the class will attempt to connect.

From Property (SSMTP Class)

The email address of the sender (required).

Syntax

public String getFrom();


public void setFrom(String from);

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: "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.

Idle Property (SSMTP Class)

The current status of the class.

Syntax

public boolean isIdle();

Default Value

True

Remarks

Idle will be False if the component is currently busy (communicating and/or waiting for an answer), and True at all other times.

This property is read-only.

Importance Property (SSMTP Class)

Importance of the mail message (optional).

Syntax

public int getImportance();


public void setImportance(int importance);


Enumerated values:
  public final static int miUnspecified = 0;
  public final static int miHigh = 1;
  public final static int miNormal = 2;
  public final static int miLow = 3;

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 how important the message is. The possible values are Unspecified (0), High (1), Normal (2), and Low (3).

IncludeCertificate Property (SSMTP Class)

This property specifies whether to include the signer's certificate with the signed message.

Syntax

public boolean isIncludeCertificate();


public void setIncludeCertificate(boolean includeCertificate);

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 (SSMTP Class)

This property specifies whether to include the signer's certificate chain with the signed message.

Syntax

public boolean isIncludeChain();


public void setIncludeChain(boolean includeChain);

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 (SSMTP Class)

The last reply from the server.

Syntax

public String getLastReply();

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 can also be retrieved through the PITrail event.

This property is read-only.

LocalHost Property (SSMTP Class)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

public String getLocalHost();


public void setLocalHost(String localHost);

Default Value

""

Remarks

The LocalHost 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 multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class 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 multi-homed 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 (SSMTP Class)

The server port for SMTP (default 25).

Syntax

public int getMailPort();


public void setMailPort(int mailPort);

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 implicit SSL, use port 465 (please refer to the SSLStartMode property for more information).

This property is not available at design time.

MailServer Property (SSMTP Class)

The name or address of a mail server (mail relay).

Syntax

public String getMailServer();


public void setMailServer(String mailServer);

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 class 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 (a UNIX host for example), 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 and 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 class 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.

Message Property (SSMTP Class)

Provides a way to set the raw message content.

Syntax

public byte[] getMessage();


public void setMessage(byte[] message);

Default Value

""

Remarks

This property may be set instead of MessageText. The value set here will not be modified in any way by the class and will be sent as is. Use caution when setting this value as all encoding must be done before supplying the value to the component.

This property is not available at design time.

MessageDate Property (SSMTP Class)

Date of the mail message (optional).

Syntax

public String getMessageDate();


public void setMessageDate(String messageDate);

Default Value

"*"

Remarks

If this property contains a non-empty 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 class

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.

MessageHeaders Property (SSMTP Class)

Collection of RFC822-encoded headers of the message.

Syntax

public HeaderList getMessageHeaders();

Remarks

This property holds the full headers of the message in RFC822 format.

This property is read-only and not available at design time.

MessageHeadersString Property (SSMTP Class)

String representation of RFC822-encoded headers of the message.

Syntax

public String getMessageHeadersString();

Default Value

""

Remarks

This property holds the full headers of the message in RFC822 format.

This property is read-only.

MessageId Property (SSMTP Class)

The Message Identifier for the message.

Syntax

public String getMessageId();


public void setMessageId(String messageId);

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 (SSMTP Class)

The collection of recipients of the message.

Syntax

public MessageRecipientList getMessageRecipients();


public void setMessageRecipients(MessageRecipientList messageRecipients);

Remarks

This property contains a collection which 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 size -1.

MessageText Property (SSMTP Class)

The full text of the message to send (without headers).

Syntax

public String getMessageText();


public void setMessageText(String messageText);

Default Value

""

Remarks

This property contains the full text of the message.

It is advisable that the text contained in this property be a collection of lines with lengths less than or equal to 80 bytes separated by CRLF ("\r\n") . The text in the message lines must contain 7-bit characters so that the message can be successfully pass through the multitude of mail systems on the Internet.

The class automatically escapes lines that start with a "." by adding another as specified in RFC 821. The message text is unescaped by the receiving agent, so the process is fully transparent.

OtherHeaders Property (SSMTP Class)

An RFC 822 compliant string consisting of extra headers.

Syntax

public String getOtherHeaders();


public void setOtherHeaders(String otherHeaders);

Default Value

""

Remarks

This property contains a string of headers to be appended to the message headers created from other properties like SendTo, Subject, etc.

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 class. 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 (Send an Email With 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.

Password Property (SSMTP Class)

A password for logon to the MailServer .

Syntax

public String getPassword();


public void setPassword(String password);

Default Value

""

Remarks

If this property is set to a non-empty string, then when connecting to the MailServer an AUTH or CRAM-MD5 (depending on the value of AuthMechanism) command is sent in order to provide authentication information for the user.

This property is not available at design time.

Priority Property (SSMTP Class)

Priority of the mail message (optional).

Syntax

public int getPriority();


public void setPriority(int priority);


Enumerated values:
  public final static int epUnspecified = 0;
  public final static int epNormal = 1;
  public final static int epUrgent = 2;
  public final static int epNonUrgent = 3;

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 (SSMTP Class)

Email address to send a read receipt to.

Syntax

public String getReadReceiptTo();


public void setReadReceiptTo(String readReceiptTo);

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 which should receive the read-receipt.

ReplyTo Property (SSMTP Class)

A mail address to which to reply (optional).

Syntax

public String getReplyTo();


public void setReplyTo(String replyTo);

Default Value

""

Remarks

If this property contains a non-empty string, a Reply-To SMTP header is created for the message. This header shows the address to use for replies (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.

ReturnPath Property (SSMTP Class)

Sets the Return-Path to be used for sending email.

Syntax

public String getReturnPath();


public void setReturnPath(String returnPath);

Default Value

""

Remarks

Setting this property sets the Return-Path to be used for sending email. If this is not set, the value in the From property is used.

SendTo Property (SSMTP Class)

A comma separated list of addresses for destinations (required).

Syntax

public String getSendTo();


public void setSendTo(String sendTo);

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: "Friendly Name" <address@company.com> or address@company.com

The class 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 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 (SSMTP Class)

Sensitivity of the mail message (optional).

Syntax

public int getSensitivity();


public void setSensitivity(int sensitivity);


Enumerated values:
  public final static int esUnspecified = 0;
  public final static int esPersonal = 1;
  public final static int esPrivate = 2;
  public final static int esCompanyConfidential = 3;

Default Value

0

Remarks

This property is 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: esPersonal (1), esPrivate (2), and esCompanyConfidential (3).

SigningAlgorithm Property (SSMTP Class)

This property includes a textual description of the signature hash algorithm.

Syntax

public String getSigningAlgorithm();


public void setSigningAlgorithm(String signingAlgorithm);

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 (SSMTP Class)

Instructs the class to unconditionally accept the server certificate that matches the supplied certificate.

Syntax

public Certificate getSSLAcceptServerCert();


public void setSSLAcceptServerCert(Certificate SSLAcceptServerCert);

Remarks

If it finds any issues with the certificate presented by the server, the class 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.

Please note that this functionality is provided only for cases where 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.

SSLCert Property (SSMTP Class)

The certificate to be used during SSL negotiation.

Syntax

public Certificate getSSLCert();


public void setSSLCert(Certificate SSLCert);

Remarks

The digital certificate that the class 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.

SSLEnabled Property (SSMTP Class)

Whether TLS/SSL is enabled.

Syntax

public boolean isSSLEnabled();


public void setSSLEnabled(boolean SSLEnabled);

Default Value

False

Remarks

This setting specifies whether TLS/SSL is enabled in the class. When False (default) the class 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 (SSMTP Class)

This specifies the SSL/TLS implementation to use.

Syntax

public int getSSLProvider();


public void setSSLProvider(int SSLProvider);


Enumerated values:
  public final static int sslpAutomatic = 0;
  public final static int sslpPlatform = 1;
  public final static int sslpInternal = 2;

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 class 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:

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected the platform implementation is used by default. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used.

SSLServerCert Property (SSMTP Class)

The server certificate for the last established connection.

Syntax

public Certificate getSSLServerCert();

Remarks

SSLServerCert contains the server certificate for the last established connection.

SSLServerCert is reset every time a new connection is attempted.

This property is read-only.

SSLStartMode Property (SSMTP Class)

Determines how the class starts the SSL negotiation.

Syntax

public int getSSLStartMode();


public void setSSLStartMode(int SSLStartMode);


Enumerated values:
  public final static int sslAutomatic = 0;
  public final static int sslImplicit = 1;
  public final static int sslExplicit = 2;
  public final static int sslNone = 3;

Default Value

3

Remarks

The SSLStartMode property may have one of the following values:

Subject Property (SSMTP Class)

The subject of the mail message (optional).

Syntax

public String getSubject();


public void setSubject(String subject);

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 (SSMTP Class)

A timeout for the class.

Syntax

public int getTimeout();


public void setTimeout(int timeout);

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 class will wait for the operation to complete before returning control.

The class 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 class throws an exception.

Please note that by default, all timeouts are inactivity timeouts, i.e. 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 (SSMTP Class)

A user identifier to login as in the MailServer .

Syntax

public String getUser();


public void setUser(String user);

Default Value

""

Remarks

If this property is set to a non-empty string, then when connecting to the MailServer an AUTH or CRAM-MD5 (depending on the value of AuthMechanism) command is sent in order to provide authentication information for the user.

This property is not available at design time.

AddRecipientCert Method (Ssmtp Class)

This method is used to add recipient certificates used to encrypt messages.

Syntax

public void addRecipientCert(byte[] certEncoded);

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 class may be used to retrieve the appropriate certificate from the system.

Config Method (Ssmtp Class)

Sets or retrieves a configuration setting.

Syntax

public String config(String configurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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 (Ssmtp Class)

This method connects to the mail relay and sends the SMTP HELO command.

Syntax

public void connect();

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 (Ssmtp Class)

This method disconnects from the SMTP server.

Syntax

public void disconnect();

Remarks

This method disconnects from the mail relay.

DoEvents Method (Ssmtp Class)

Processes events from the internal message queue.

Syntax

public void doEvents();

Remarks

When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Encrypt Method (Ssmtp Class)

This method encrypts the message.

Syntax

public void encrypt();

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.

Expand Method (Ssmtp Class)

This method asks the MailServer to expand a name or mailing list.

Syntax

public void expand(String emailAddress);

Remarks

This method asks the MailServer to expand a name or mailing list. The resulting response is provided in one or more Expand events (one for each address). The class will try to connect to the mail relay if it is not already connected.

Interrupt Method (Ssmtp Class)

Interrupt the current method.

Syntax

public void interrupt();

Remarks

If there is no method in progress, Interrupt simply returns, doing nothing.

ProcessQueue Method (Ssmtp Class)

Sends the messages which have previously been queued into QueueDir .

Syntax

public void processQueue(String queueDir);

Remarks

This method sends the messages which have previously been queued into QueueDir. The PITrail event shows the interaction with the server as messages as are processed.

This method looks in the directory for files with 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 (Ssmtp Class)

Queues the message into QueueDir .

Syntax

public String queue(String queueDir);

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.

The 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 (Ssmtp Class)

Reset the class.

Syntax

public void reset();

Remarks

This method will reset the class's properties to their default values.

ResetHeaders Method (Ssmtp Class)

Resets all the message headers to empty.

Syntax

public void resetHeaders();

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 (Ssmtp Class)

Sends the current message.

Syntax

public void send();

Remarks

This method sends the current message. If the class 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 class 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 Email)

SMTPControl.MailServer = "MyServer" SMTPControl.From = "me@server.com" SMTPControl.SendTo = "recipient@server.com" SMTPControl.Subject = "My Subject" SMTPControl.MessageText = "This is the message body" SMTPControl.Send()

SendCommand Method (Ssmtp Class)

Sends the exact command directly to the server.

Syntax

public void sendCommand(String command);

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 and/or monitor the PITrail event to obtain the server's response.

SendToTerminalAndEmail Method (Ssmtp Class)

Sends to terminal and email.

Syntax

public void sendToTerminalAndEmail();

Remarks

This method is similar to Send but requests also that the message is sent to the terminal of the user as well, if he is logged on and accepts terminal messages. This method requires that AllowExtensions is set to True and is not supported by all mail relays.

SendToTerminalOnly Method (Ssmtp Class)

Sends to terminal only.

Syntax

public void sendToTerminalOnly();

Remarks

This method is similar to Send but requests instead that the message is sent to the user's terminal. An exception with the server's response is raised if the user is not logged in or does not accept terminal messages. This method requires that AllowExtensions is set to True and is not supported by all mail relays.

SendToTerminalOrEmail Method (Ssmtp Class)

Sends to terminal or email.

Syntax

public void sendToTerminalOrEmail();

Remarks

This method is similar to Send but requests instead that the message is first sent to the user's terminal. If the user is not logged in or does not accept terminal messages, the message is sent to his mailbox. This method requires that AllowExtensions is set to True and is not supported by all mail relays.

SetMessageStream Method (Ssmtp Class)

Sets the stream to be uploaded to the server as part of the message.

Syntax

public void setMessageStream(java.io.InputStream messageStream);

Remarks

This method sets the stream to be uploaded to the server as part of the message. If an upload stream is set before the Send method is called, the content of the stream will be read by the class and uploaded to the server; The stream should be open and normally set to position 0. The class will automatically close this stream if CloseStreamAfterTransfer is set to true (default). If the stream is closed, you will need to call this method again before calling Send again. The content of the stream will be read from the current position all the way to the end.

Note: This method and LocalFile will reset the other.

Sign Method (Ssmtp Class)

Signs the current message.

Syntax

public void sign();

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 (Ssmtp Class)

Signs and encrypts the current message.

Syntax

public void signAndEncrypt();

Remarks

This method both signs and encrypts the input message into a single PKCS encoded envelope.

Please note that 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.

Verify Method (Ssmtp Class)

Sends a Verification request to the SMTP server.

Syntax

public void verify(String emailAddress);

Remarks

This method asks the MailServer to verify the email address provided in the 'EmailAddress' parameter.

ConnectionStatus Event (Ssmtp Class)

This event is fired to indicate changes in the connection state.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void connectionStatus(SsmtpConnectionStatusEvent e) {}
  ...
}

public class SsmtpConnectionStatusEvent {
  public String connectionEvent;
  public int statusCode;
  public String description;
}

Remarks

The ConnectionStatus 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:

EndTransfer Event (Ssmtp Class)

This event is fired when the message text completes transferring.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void endTransfer(SsmtpEndTransferEvent e) {}
  ...
}

public class SsmtpEndTransferEvent {
  public int direction;
}

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 (Ssmtp Class)

Information about errors during data delivery.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void error(SsmtpErrorEvent e) {}
  ...
}

public class SsmtpErrorEvent {
  public int errorCode;
  public String description;
}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class throws an exception.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

Expand Event (Ssmtp Class)

This event is fired for every email address returned by the server when the Expand method is called.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void expand(SsmtpExpandEvent e) {}
  ...
}

public class SsmtpExpandEvent {
  public String address;
}

Remarks

This event is fired for every email address as returned by the mail server when the Expand method is called.

The Address parameter may contain a name and an email address, or just an email address, suitable for any of the addressing properties.

PITrail Event (Ssmtp Class)

Traces the commands sent to the mail server, and the respective replies.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void PITrail(SsmtpPITrailEvent e) {}
  ...
}

public class SsmtpPITrailEvent {
  public int direction;
  public String message;
}

Remarks

The PITrail event is useful for debugging purposes. It shows all 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:

SSLServerAuthentication Event (Ssmtp Class)

Fired after the server presents its certificate to the client.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void SSLServerAuthentication(SsmtpSSLServerAuthenticationEvent e) {}
  ...
}

public class SsmtpSSLServerAuthenticationEvent {
  public byte[] certEncoded;
  public String certSubject;
  public String certIssuer;
  public String status;
  public boolean accept;
}

Remarks

This event is where the client can decide whether to continue with the connection process or not. 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 to continue or not.

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 (Ssmtp Class)

Shows the progress of the secure connection.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void SSLStatus(SsmtpSSLStatusEvent e) {}
  ...
}

public class SsmtpSSLStatusEvent {
  public String message;
}

Remarks

The event is fired for informational and logging purposes only. Used to track the progress of the connection.

StartTransfer Event (Ssmtp Class)

Fired when the message text starts transferring.

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void startTransfer(SsmtpStartTransferEvent e) {}
  ...
}

public class SsmtpStartTransferEvent {
  public int direction;
}

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 (Ssmtp Class)

Fired while the message text gets transferred to MailServer .

Syntax

public class DefaultSsmtpEventListener implements SsmtpEventListener {
  ...
  public void transfer(SsmtpTransferEvent e) {}
  ...
}

public class SsmtpTransferEvent {
  public int direction;
  public long bytesTransferred;
  public int percentDone;
  public byte[] text;
}

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 and/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

Constructors

public Certificate();

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

public Certificate( certificateFile);

Opens CertificateFile and reads out the contents as an X509 public key.

public Certificate( certificateData);

Parses CertificateData as an X509 public key.

public Certificate( certStoreType,  store,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType 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 class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType 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 CyrptoAPI option. The default value is True (the key is persisted). "Thumbprint" - a MD5, SHA1, or SHA256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to 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 class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  store,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType 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 class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

public Certificate( certStoreType,  storeBlob,  storePassword,  subject);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  subject,  configurationString);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

public Certificate( certStoreType,  storeBlob,  storePassword,  encoded);

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or base64-encoded) containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the class will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

Firewall Type

This is the firewall the class 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

Constructors

public Firewall();

Header Type

This is an HTTP header as it is received from the server.

Remarks

When a header is received through a Header event, it is parsed into a Header type. This type contains a Field, and its corresponding Value.

Fields

Constructors

public Header();

public Header( field,  value);

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 class is sending the message.

Fields

Constructors

public MessageRecipient();

public MessageRecipient( address);

public MessageRecipient( address,  recipientType);

Config Settings (Ssmtp Class)

SMTP Config Settings

TCPClient Config Settings

SSL Config Settings

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

Socket Config Settings

Base Config Settings

Trappable Errors (Ssmtp Class)

SMTP Errors

TCPClient Errors

SSL Errors

TCP/IP Errors