PSMTP Class

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The PSMTP class is used to send encrypted and/or signed emails with or without attachments using OpenPGP.

Syntax

ipworksopenpgp.psmtp()

Remarks

You can send an OpenPGP signed and encrypted message using the PSMTP class by calling the Encrypt, Sign, and SignAndEncrypt methods. Additionally, it enables you to create messages bound for multiple recipients with different keys, simultaneously encrypt and compress with the most popular compression algorithms, and control other aspects such as the encrypting algorithm to use.

Construct the Message

To begin specify common email properties such as SendTo, Cc, BCc, Subject, and MessageText. Connection information is specified by setting MailServer, and MailPort.

Sign

To sign a message specify a recipient key using the Key* properties. For instance: PSMTP1.KeyCount = 1 PSMTP1.KeyKeyring(0) = "c:\my_keyring_dir" PSMTP1.KeyUserId(0) = "sender@nsoftware.com" PSMTP1.KeyPassphrase(0) = "password" The specified private key will be used to sign the message when Sign is called.

Encrypt

To both sign and encrypt a message call SignAndEncrypt.

To encrypt a message specify a recipient key using the RecipientKey* properties. For instance: PSMTP1.RecipientKeyCount = 1 PSMTP1.RecipientKeyKeyring(0) = "c:\my_keyring_dir" PSMTP1.RecipientKeyUserId(0) = "recipient@nsoftware.com" The specified public key will be used to encrypt the message when Encrypt is called.

Sign and Encrypt

You can call the SignAndEncrypt method to sign and encrypt messages in one step. Set the public key of the recipient to be used for encryption in the and the private key to be used to sign the message in the Key* properties .

Send

Once all the appropriate properties have been set, call the Send method and the message will be sent to its intended recipient(s).

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.

PSMTP.AllowExtensions Property

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

Syntax

isAllowExtensions(): boolean;
setAllowExtensions(allowExtensions: boolean): void;

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.

PSMTP.AuthMechanism Property

This property is used when connecting to the mail server.

Syntax

getAuthMechanism(): PSMTPAuthMechanisms;
setAuthMechanism(authMechanism: PSMTPAuthMechanisms): void;

enum PSMTPAuthMechanisms {
  amUserPassword,
  amCRAMMD5,
  amNTLM,
  amAPOP,
  amSASLPlain,
  amSASLDigestMD5,
  amKerberos,
  amXOAUTH2
}

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.

PSMTP.BCc Property

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

Syntax

getBCc(): string;
setBCc(BCc: string): void;

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 properties before setting this property to remove previous recipients.

PSMTP.Cc Property

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

Syntax

getCc(): string;
setCc(cc: string): void;

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 properties before setting this property to remove previous recipients.

PSMTP.CompressionMethod Property

The compression algorithm used.

Syntax

getCompressionMethod(): string;
setCompressionMethod(compressionMethod: string): void;

Default Value

"zip"

Remarks

This property specifies which compression method is used when generating output. Possible values are:

• zip (default)
• zlib
• bzip2
• none or uncompressed

PSMTP.Connected Property

Whether the class is connected.

Syntax

isConnected(): boolean;

Default Value

FALSE

Remarks

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

PSMTP.DeliveryNotificationTo Property

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

Syntax

getDeliveryNotificationTo(): string;
setDeliveryNotificationTo(deliveryNotificationTo: string): void;

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.

PSMTP.EncryptingAlgorithm Property

The encryption algorithm used when encrypting.

Syntax

getEncryptingAlgorithm(): string;
setEncryptingAlgorithm(encryptingAlgorithm: string): void;

Default Value

"AES128"

Remarks

This property specifies the encryption algorithm used when encrypting. Possible values are:

• CAST5
• 3DES or TripleDES
• AES256
• AES192
• AES128 (default)
• BLOWFISH
• TWOFISH
• IDEA
• AES256-OCB (AEAD)
• AES192-OCB (AEAD)
• AES128-OCB (AEAD)
• AES256-GCM (AEAD)
• AES192-GCM (AEAD)
• AES128-GCM (AEAD)

Note that if UseArgon2 is enabled, and SymmetricPassphrase is specified, an AEAD encryption algorithm (AES*-OCB and AES*-GCM) must be specified for symmetric encryption. If UseArgon2 is disabled, and an AEAD encryption algorithm is specified, the AEAD mode (OCB or GCM) will be ignored when performing symmetric encryption.

An AEAD encryption algorithm may optionally be utilized when encrypting messages (when calling Encrypt). In this case, the AEADChunkSizeExp configuration will specify the chunk size for splitting plaintext for encryption. Please see AEADChunkSizeExp for additional details.

PSMTP.Firewall Property

A set of properties related to firewall access.

Syntax

getFirewall(): Firewall;
setFirewall(firewall: Firewall): void;

Default Value

Remarks

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

PSMTP.From Property

This property includes the email address of the sender (required).

Syntax

getFrom(): string;
setFrom(from: string): void;

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.

PSMTP.Idle Property

The current status of the class.

Syntax

isIdle(): boolean;

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.

PSMTP.Importance Property

This property indicates the importance of the mail message (optional).

Syntax

getImportance(): PSMTPImportances;
setImportance(importance: PSMTPImportances): void;

enum PSMTPImportances {
  miUnspecified,
  miHigh,
  miNormal,
  miLow
}

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).

PSMTP.Keys Property

A collection of keys used for cryptographic operations.

Syntax

getKeys(): KeyList;
setKeys(keys: KeyList): void;

Default Value

Remarks

This collection holds keys that are used for signing and decrypting. In most cases only one key will be specified, however multiple keys may be needed in some cases.

This property is not available at design time.

PSMTP.LastReply Property

This property indicates the last reply received from the server.

Syntax

getLastReply(): string;

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.

PSMTP.LocalHost Property

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

Syntax

getLocalHost(): string;
setLocalHost(localHost: string): void;

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 class initiate connections (or accept in the case of server classs) 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 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 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.

PSMTP.MailPort Property

This property includes the server port for SMTP (default 25).

Syntax

getMailPort(): number;
setMailPort(mailPort: number): void;

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.

PSMTP.MailServer Property

This property includes the name or address of a mail server (mail relay).

Syntax

getMailServer(): string;
setMailServer(mailServer: string): void;

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 (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 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.

PSMTP.Message Property

This property provides a way to set the raw message content.

Syntax

getMessage(): Uint8Array;
setMessage(message: Uint8Array): void;

Default Value

""

Remarks

This property may be set instead of MessageText. This value 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.

PSMTP.MessageDate Property

This property includes the date of the mail message (optional).

Syntax

getMessageDate(): string;
setMessageDate(messageDate: string): void;

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 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.

PSMTP.MessageHeaders Property

This property includes a collection of RFC 822-encoded headers of the message.

Syntax

getMessageHeaders(): HeaderList;

Default Value

Remarks

This property holds the full headers of the message in RFC 822 format.

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

PSMTP.MessageHeadersString Property

This property includes the string representation of RFC 822-encoded headers of the message.

Syntax

getMessageHeadersString(): string;

Default Value

""

Remarks

This property holds the full headers of the message in RFC 822 format.

This property is read-only.

PSMTP.MessageId Property

This property includes the message identifier for the message.

Syntax

getMessageId(): string;
setMessageId(messageId: string): void;

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.

PSMTP.MessageRecipients Property

This property includes the collection of recipients of the message.

Syntax

getMessageRecipients(): MessageRecipientList;
setMessageRecipients(messageRecipients: MessageRecipientList): void;

Default Value

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.

PSMTP.MessageText Property

This property includes the full text of the message to send (without headers).

Syntax

getMessageText(): string;
setMessageText(messageText: string): void;

Default Value

""

Remarks

This property contains the full text of the message.

The text contained in this property should be a collection of lines with lengths less than or equal to 80 bytes separated by . The text in the message lines must contain 7-bit characters so that the message can 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.

PSMTP.OtherHeaders Property

This property includes an RFC 822-compliant string consisting of extra headers.

Syntax

getOtherHeaders(): string;
setOtherHeaders(otherHeaders: string): void;

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 .

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. 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.

PSMTP.Password Property

This property includes a password for logon to the MailServer .

Syntax

getPassword(): string;
setPassword(password: string): void;

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.

PSMTP.Priority Property

This property includes the priority of the mail message (optional).

Syntax

getPriority(): PSMTPPriorities;
setPriority(priority: PSMTPPriorities): void;

enum PSMTPPriorities {
  epUnspecified,
  epNormal,
  epUrgent,
  epNonUrgent
}

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.

PSMTP.ReadReceiptTo Property

This property includes the email address to send a read-receipt to.

Syntax

getReadReceiptTo(): string;
setReadReceiptTo(readReceiptTo: string): void;

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.

PSMTP.RecipientKeys Property

The collection of keys belonging to the recipient of the message.

Syntax

getRecipientKeys(): KeyList;
setRecipientKeys(recipientKeys: KeyList): void;

Default Value

Remarks

This property contains the keys of the message recipient.

Set this property before calling Encrypt or SignAndEncrypt.

This property is not available at design time.

PSMTP.ReplyTo Property

This property includes a mail address to which to reply (optional).

Syntax

getReplyTo(): string;
setReplyTo(replyTo: string): void;

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.

PSMTP.ReturnPath Property

This property sets the Return-Path to be used for sending email.

Syntax

getReturnPath(): string;
setReturnPath(returnPath: string): void;

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.

PSMTP.SendTo Property

This property includes a comma-separated list of addresses for destinations (required).

Syntax

getSendTo(): string;
setSendTo(sendTo: string): void;

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 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 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 properties before setting this property to remove previous recipients.

PSMTP.Sensitivity Property

This property indicates the sensitivity of the mail message (optional).

Syntax

getSensitivity(): PSMTPSensitivities;
setSensitivity(sensitivity: PSMTPSensitivities): void;

enum PSMTPSensitivities {
  esUnspecified,
  esPersonal,
  esPrivate,
  esCompanyConfidential
}

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).

PSMTP.SigningAlgorithm Property

The signature hash algorithm used when signing.

Syntax

getSigningAlgorithm(): string;
setSigningAlgorithm(signingAlgorithm: string): void;

Default Value

"SHA256"

Remarks

This property specifies the signature hash algorithm used when signing. Possible values are:

• SHA1
• MD5
• SHA256 (default)
• SHA384
• SHA512
• SHA224
• RIPEMD160
• SHA3-256
• SHA3-512

PSMTP.SSLAcceptServerCert Property

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

Syntax

getSSLAcceptServerCert(): Certificate;
setSSLAcceptServerCert(SSLAcceptServerCert: Certificate): void;

Default Value

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.

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.

PSMTP.SSLCert Property

The certificate to be used during Secure Sockets Layer (SSL) negotiation.

Syntax

getSSLCert(): Certificate;
setSSLCert(SSLCert: Certificate): void;

Default Value

Remarks

This property includes 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 field to the encoded certificate. To select a certificate, use the store and subject fields.

PSMTP.SSLEnabled Property

This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled.

Syntax

isSSLEnabled(): boolean;
setSSLEnabled(SSLEnabled: boolean): void;

Default Value

FALSE

Remarks

This property 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.

PSMTP.SSLProvider Property

The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.

Syntax

getSSLProvider(): PSMTPSSLProviders;
setSSLProvider(SSLProvider: PSMTPSSLProviders): void;

enum PSMTPSSLProviders {
  sslpAutomatic,
  sslpPlatform,
  sslpInternal
}

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 as follows:

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 will be used by default in all cases in the JavaScript edition.

Note: The internal provider is not support at this time.

PSMTP.SSLServerCert Property

The server certificate for the last established connection.

Syntax

getSSLServerCert(): Certificate;

Default Value

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.

PSMTP.SSLStartMode Property

This property determines how the class starts the Secure Sockets Layer (SSL) negotiation.

Syntax

getSSLStartMode(): PSMTPSSLStartModes;
setSSLStartMode(SSLStartMode: PSMTPSSLStartModes): void;

enum PSMTPSSLStartModes {
  sslAutomatic,
  sslImplicit,
  sslExplicit,
  sslNone
}

Default Value

3

Remarks

The SSLStartMode property may have one of the following values:

PSMTP.Subject Property

This property includes the subject of the mail message (optional).

Syntax

getSubject(): string;
setSubject(subject: string): void;

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.

PSMTP.Timeout Property

The timeout for the class.

Syntax

getTimeout(): number;
setTimeout(timeout: number): void;

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 .

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.

PSMTP.User Property

This property includes the user identifier needed to log in as in the MailServer .

Syntax

getUser(): string;
setUser(user: string): void;

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.

PSMTP.config Method

Sets or retrieves a configuration setting.

Syntax

async psmtp.config(configurationString : string): Promise<string>

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.

PSMTP.connect Method

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

Syntax

async psmtp.connect(): Promise<void>

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()

PSMTP.disconnect Method

This method disconnects from the SMTP server.

Syntax

async psmtp.disconnect(): Promise<void>

Remarks

This method disconnects from the mail relay.

PSMTP.doEvents Method

This method processes events from the internal message queue.

Syntax

async psmtp.doEvents(): Promise<void>

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.

PSMTP.encrypt Method

Encrypts the message.

Syntax

async psmtp.encrypt(): Promise<void>

Remarks

This method encrypts the specified message.

The message is encrypted with the public keys specified in RecipientKeys.

When encrypting, the following properties may be used to further configure the class:

• CompressionMethod
• EncryptingAlgorithm

PSMTP.expand Method

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

Syntax

async psmtp.expand(emailAddress : string): Promise<void>

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.

PSMTP.interrupt Method

This method interrupts the current method.

Syntax

async psmtp.interrupt(): Promise<void>

Remarks

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

PSMTP.processQueue Method

This method sends the messages that previously have been queued into QueueDir .

Syntax

async psmtp.processQueue(queueDir : string): Promise<void>

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.

PSMTP.queue Method

This method queues the message into QueueDir .

Syntax

async psmtp.queue(queueDir : string): Promise<string>

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.

PSMTP.resetHeaders Method

This method resets all the message headers to empty.

Syntax

async psmtp.resetHeaders(): Promise<void>

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.

PSMTP.send Method

This method sends the current message.

Syntax

async psmtp.send(): Promise<void>

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()

PSMTP.sendCommand Method

This method sends the exact command directly to the server.

Syntax

async psmtp.sendCommand(command : string): Promise<void>

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.

PSMTP.sendToTerminalAndEmail Method

This method sends to terminal and email.

Syntax

async psmtp.sendToTerminalAndEmail(): Promise<void>

Remarks

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

PSMTP.sendToTerminalOnly Method

This method sends to terminal only.

Syntax

async psmtp.sendToTerminalOnly(): Promise<void>

Remarks

This method is similar to Send but requests instead that the message is sent to the user's terminal. 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.

PSMTP.sendToTerminalOrEmail Method

This method sends to terminal or email.

Syntax

async psmtp.sendToTerminalOrEmail(): Promise<void>

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 or her mailbox. This method requires that AllowExtensions is set to True and is not supported by all mail relays.

PSMTP.sign Method

Signs the message.

Syntax

async psmtp.sign(): Promise<void>

Remarks

This method signs the specified message.

The message is signed with the private key specified in Keys.

When signing, the following properties may be used to further configure the class:

• ClearSignature
• SigningAlgorithm

PSMTP.signAndEncrypt Method

Signs and encrypts the current message.

Syntax

async psmtp.signAndEncrypt(): Promise<void>

Remarks

This method signs and encrypts the specified message.

The message is encrypted with the public keys specified in RecipientKeys and signed with the private key specified in Keys.

When encrypting, the following properties may be used to further configure the class:

• CompressionMethod
• EncryptingAlgorithm

When signing, the following properties may be used to further configure the class:

• ClearSignature
• SigningAlgorithm

PSMTP.verify Method

This method sends a verification request to the SMTP server.

Syntax

async psmtp.verify(emailAddress : string): Promise<void>

Remarks

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

PSMTP.ConnectionStatus Event

Fired to indicate changes in the connection state.

Syntax

psmtp.on('ConnectionStatus', listener: (e: {readonly connectionEvent: string, readonly statusCode: number, readonly description: string}) => void )

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:

PSMTP.EndTransfer Event

This event is fired when the message text completes transferring.

Syntax

psmtp.on('EndTransfer', listener: (e: {readonly direction: number}) => void )

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.

PSMTP.Error Event

Fired when information is available about errors during data delivery.

Syntax

psmtp.on('Error', listener: (e: {readonly errorCode: number, readonly description: string}) => void )

Remarks

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

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.

PSMTP.Expand Event

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

Syntax

psmtp.on('Expand', listener: (e: {readonly address: string}) => void )

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.

PSMTP.KeyPassphrase Event

Fired if the passphrase of current key is incorrect or empty.

Syntax

psmtp.on('KeyPassphrase', listener: (e: {readonly userId: string, readonly keyId: string, readonly fingerprint: string, passphrase: string}) => void )

Remarks

This event fires when the passphrase for the key is required. The passphrase must be specified before operations requiring the secret key are attempted. The passphrase may be supplied by setting the Passphrase parameter in this event, or by specifying the KeysPassphrase property before attempting the operation.

The passphrase is required when using the following methods in KeyMgr:

• AddUserId
• SignUserId
• ChangeExpirationDate
• ChangePassphrase

When using the OpenPGP class, or an email-based class, the following methods require a passphrase for the key:

• Decrypt
• Sign
• SignAndEncrypt

UserId holds the user Id of the key the passphrase is required for.

The UserId format is:

FirstName LastName (Comment) <Email>

Note that for OpenPGP v6, a key may be created with or without a UserId, as the field is optional. If a key was created without a UserId, the key's Fingerprint can be used as it's identifier instead.

KeyId is the hex-encoded, 4-byte or 8-byte Id of the key the passphrase is required for. For OpenPGP v4 keys and earlier, the key Id corresponds to the last 4 or 8 bytes of the key's Fingerprint. For OpenPGP v6 keys, the key Id corresponds to the first 8 bytes of the key's Fingerprint instead. For instance:

5E70662EA810E768

Fingerprint holds the hex-encoded, 20-byte fingerprint of the key the passphrase is required for. This is in the form:

5E70662EA810E768391A2FE8F7B7D49C89C9D7B1

PSMTP.PITrail Event

This event traces the commands sent to the mail server, and the respective replies.

Syntax

psmtp.on('PITrail', listener: (e: {readonly direction: number, readonly message: string}) => void )

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:

PSMTP.Progress Event

Fired as progress is made.

Syntax

psmtp.on('Progress', listener: (e: {readonly bytesProcessed: number, readonly percentProcessed: number}) => void )

Remarks

This event is fired automatically as data is processed by the class.

The PercentProcessed parameter indicates the current status of the operation.

The BytesProcessed parameter holds the total number of bytes processed so far.

PSMTP.SSLServerAuthentication Event

Fired after the server presents its certificate to the client.

Syntax

psmtp.on('SSLServerAuthentication', listener: (e: {readonly certEncoded: string, readonly certEncodedB: Uint8Array, readonly certSubject: string, readonly certIssuer: string, readonly status: string, accept: boolean}) => void )

Remarks

This event fires with information about the server certificate. The Status property shows why verification failed (otherwise, Status contains the string OK). To manually accept an untrusted certificate, the SSLAcceptAnyServerCert setting must be set to True before initiating the connection.

PSMTP.SSLStatus Event

Fired when secure connection progress messages are available.

Syntax

psmtp.on('SSLStatus', listener: (e: {readonly message: string}) => void )

Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

PSMTP.StartTransfer Event

This event is fired when the message text starts transferring.

Syntax

psmtp.on('StartTransfer', listener: (e: {readonly direction: number}) => void )

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.

PSMTP.Status Event

Shows the progress of the operation.

Syntax

psmtp.on('Status', listener: (e: {readonly message: string}) => void )

Remarks

The event is fired for informational and logging purposes only. It may be used to track the progress of an operation.

The level of detail is controlled by the LogLevel setting.

PSMTP.Transfer Event

This event is fired when the message text is transferred to MailServer .

Syntax

psmtp.on('Transfer', listener: (e: {readonly direction: number, readonly bytesTransferred: number, readonly percentDone: number, readonly text: string, readonly textB: Uint8Array}) => void )

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

Constructors

public Certificate();

public Certificate(String certificateFile);

public Certificate(byte[] encoded);

public Certificate(int storeType, String store, String storePassword, String subject);

public Certificate(int storeType, String store, String storePassword, String subject, String configurationString);

public Certificate(int storeType, String store, String storePassword, byte[] encoded);

public Certificate(int storeType, byte[] store, String storePassword, String subject);

public Certificate(int storeType, byte[] store, String storePassword, String subject, String configurationString);

public Certificate(int storeType, byte[] store, String storePassword, byte[] encoded);

Firewall Type

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 and the .

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 , and its corresponding .

Fields

Constructors

public Header();

public Header(String field, String value);

Key Type

The OpenPGP key being used.

Remarks

This type describes the current key. The key may be a public or secret key. The fields are used to identify or select the key.

Fields

5E70662EA810E768391A2FE8F7B7D49C89C9D7B1

5E70662EA810E768

FirstName LastName (Comment) <Email>

Constructors

public Key(String keyring);

public Key(byte[] encoded);

public Key(String keyring, String userId);

public Key(String keyring, String secretKeyringFile, String publicKeyringFile, String userId);

public Key(byte[] encoded, String userId);

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(String address);

public MessageRecipient(String address, int recipientType);

Config Settings (class ipworksopenpgp.psmtp)

PSMTP Config Settings

SMTP Config Settings

TCPClient Config Settings

SSL Config Settings

-----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-----

-----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-----

-----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-----

Socket Config Settings

Base Config Settings

Trappable Errors (class ipworksopenpgp.psmtp)

SMTP Errors

TCPClient Errors

SSL Errors

TCP/IP Errors

OpenPGP Errors