SPOP Class

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The SPOP Class is used to easily retrieve electronic mail from internet post office servers (POP).

Syntax

ipworkssmime.spop()

Remarks

The SPOP Class is the S/MIME-enabled equivalent of the IPWorks POP Class. In addition to standard POP functions, the SPOP class can decrypt and verify message signatures. The methods and properties for decrypting and verifying signatures are identical to those provided with the S/MIME Class. When attempting to verify a signed message or when decrypting a message call, the Decrypt, VerifySignature, or DecryptAndVerifySignature methods and the resulting text will be replaced in Message.

The SPOP Class implements a standard internet post office (POP3) client as specified in RFC 1725.

To connect to a MailServer, first set the appropriate User and Password and then connect by calling the Connect method. Upon successful connection to the MailServer, the number of waiting messages is shown by the MessageCount property. A message is selected by setting the MessageNumber property to a number between 1 and MessageCount (inclusive). Then, the message text and headers are received by calling the Retrieve method.

The message text is received through the Transfer event, whereas the message headers are received through the Header event. Additionally, up to MaxLines from the message body are provided in the MessageText property. The body of the message is also saved in the file specified by the LocalFile property. StartTransfer and EndTransfer events are fired at the beginning and end of message transmission. The PITrail event provides a trace of the interaction between the client and server (excluding message transfers).

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.

SPOP.AuthMechanism Property

This property includes the authentication mechanism to be used when connecting to the mail server.

Syntax

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

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

Default Value

0

Remarks

This property is used as the authentication mechanism when connecting to the mail server. By default, this property is amUserPassword (0), and default plaintext authentication is used to log in to the server. Other, more secure, options include amCRAMMD5 (1) for CRAM-MD5, amNTLM (2) for NTLM authentication, amAPOP (3) for APOP authentication, and amSASLDigestMD5 (5) for SASL DIGEST-MD5 authentication.

amSASLPlain (4) is also available, but most servers require a Secure Sockets Layer (SSL) connection when utilizing this authentication mechanism.

amKerberos (6) is for Kerberos authentication. Note: This functionality is available only in Windows.

SPOP.Certificate Property

This property includes the current selected certificate.

Syntax

getCertificate(): Certificate;
setCertificate(certificate: Certificate): void;

Default Value

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.

SPOP.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.

SPOP.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.

SPOP.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.

SPOP.IncludeHeaders Property

This property instructs the class to include the headers in the MessageText and LocalFile.

Syntax

isIncludeHeaders(): boolean;
setIncludeHeaders(includeHeaders: boolean): void;

Default Value

FALSE

Remarks

This property instructs the component to include the headers in the MessageText and LocalFile. If set to True, the headers for the message being retrieved will be placed before the message body in the MessageText property;. If LocalFile is set, then the headers will be written to that file before the message body. In this manner, the whole content of a MIME-encoded message can be passed to the MIME class for further message processing.

SPOP.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.

SPOP.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.

SPOP.MailPort Property

This property includes the server port for POP (default 110).

Syntax

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

Default Value

110

Remarks

This property contains the server port for POP (default 110). 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 Secure Sockets Layer (SSL), use port 995 (please refer to the SSLStartMode property for more information).

This property is not available at design time.

SPOP.MailServer Property

This property includes the name or address of a mail server (internet post office server).

Syntax

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

Default Value

""

Remarks

This property specifies the IP address (IP number in dotted internet format) or the domain name of the mail server. It is set before a connection is attempted and cannot be changed once a connection is in progress.

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, the class .

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.

SPOP.MaxLines Property

This property includes the maximum number of message lines other than headers to retrieve.

Syntax

getMaxLines(): number;
setMaxLines(maxLines: number): void;

Default Value

0

Remarks

This property is used to limit the number of text lines other than headers retrieved for messages. It can be used to preview message headers and a portion of their contents, without incurring the overhead of downloading the entire message.

The default value of the property is 0. In this case, the entire message will be retrieved, without interruptions. Note: If you are not retrieving the entire message (MaxLines is nonzero), no data will be written to LocalFile.

SPOP.Message Property

This property provides the raw message content.

Syntax

getMessage(): Uint8Array;

Default Value

""

Remarks

This property is populated after calling Retrieve and holds the raw message content. This can be used to access the data before any processing is done by the class.

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

SPOP.MessageCc Property

This property includes the value of the CC header of the last retrieved message.

Syntax

getMessageCc(): string;

Default Value

""

Remarks

This property contains the value of the CC header of the last retrieved message. The same information also may be retrieved through the Header event.

This property is read-only.

SPOP.MessageCount Property

This property includes the number of messages in the mailbox.

Syntax

getMessageCount(): number;

Default Value

0

Remarks

This property contains the number of messages in the mailbox. When the class is not connected to the server, the value of this property is 0. When connected, it contains the number of messages in the mailbox as reported by the POP server.

This property is read-only.

SPOP.MessageDate Property

This property includes the value of the date header of the last retrieved message.

Syntax

getMessageDate(): string;

Default Value

""

Remarks

This property contains the value of the date header of the last retrieved message. The same information also may be retrieved through the Header event.

This property is read-only.

SPOP.MessageFrom Property

This property includes the value of the from header of the last retrieved message.

Syntax

getMessageFrom(): string;

Default Value

""

Remarks

This property contains the value of the from header of the last retrieved message. The same information also may be retrieved through the Header event.

This property is read-only.

SPOP.MessageHeaders Property

This property includes a collection of the message headers as retrieved from the server.

Syntax

getMessageHeaders(): HeaderList;

Default Value

Remarks

This property contains a collection of the message headers as retrieved from the server. If the class is not connected, or MessageNumber does not contain a valid message number, the value of this property is an empty collection. Otherwise, it contains a parsed collection of the full headers of the mail message as reported by the server.

The MailServer is asked about the headers of the message only if the MessageNumber property has changed. If MessageNumber has not changed, the class returns a cached value.

Example. Connect and Retrieve Messages:

POPControl.MailServer = "MyPOPServer" POPControl.User = "username" POPControl.Password = "password" POPControl.Connect() POPControl.MessageNumber = 1 MessageText = POPControl.MessageText MessageHeaders = POPControl.MessageHeaders

This property is read-only.

SPOP.MessageHeadersString Property

This property includes a string representation of the full headers of the message as retrieved from the server.

Syntax

getMessageHeadersString(): string;

Default Value

""

Remarks

This property contains a string representation of the full headers of the message as retrieved from the server. If the class is not connected, or MessageNumber does not contain a valid message number, the value of this property is an empty string. Otherwise, it contains the full headers of the mail message as reported by the server.

The MailServer is asked about the headers of the message only if the MessageNumber property has changed. If MessageNumber has not changed, the class returns a cached value.

Example. Connect and Retrieve Messages:

POPControl.MailServer = "MyPOPServer" POPControl.User = "username" POPControl.Password = "password" POPControl.Connect() POPControl.MessageNumber = 1 MessageText = POPControl.MessageText MessageHeadersString = POPControl.MessageHeadersString

This property is read-only.

SPOP.MessageNumber Property

This property includes the current (selected) message.

Syntax

getMessageNumber(): number;
setMessageNumber(messageNumber: number): void;

Default Value

1

Remarks

This property indicates the current (selected) message. This property specifies a message number in between 1 and MessageCount. The various class methods related to single messages use this property as a message pointer (see method descriptions and the QueryMessageSize method).

SPOP.MessageRecipients Property

This property includes a collection of recipients for the current message.

Syntax

getMessageRecipients(): MessageRecipientList;

Default Value

Remarks

This property contains a collection of recipients for the current message. This collection describes all of the people to whom the last retrieved message was sent. Each MessageRecipient contains information describing that recipient, and what type of recipient it is.

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

SPOP.MessageReplyTo Property

This property includes the value of the Reply-To header of the last retrieved message.

Syntax

getMessageReplyTo(): string;

Default Value

""

Remarks

This property contains the value of the Reply-To header of the last retrieved message. The same information also may be retrieved through the Header event.

This property is read-only.

SPOP.MessageSubject Property

This property includes the value of the Subject header of the last retrieved message.

Syntax

getMessageSubject(): string;

Default Value

""

Remarks

This property contains the value of the Subject header of the last retrieved message. The same information also may be retrieved through the Header event.

This property is read-only.

SPOP.MessageText Property

This property includes the full text of the message as retrieved from the server.

Syntax

getMessageText(): string;

Default Value

""

Remarks

This property contains the full text of the message as retrieved from the server. If the class is not connected, or MessageNumber does not contain a valid message number, the value of this property is an empty string. Otherwise, it contains the text of the mail message as reported by the server (a maximum of MaxLines).

The MailServer is asked about the text of the message only if the MessageNumber property has changed. If MessageNumber has not changed, the class returns a cached value.

Example. Connect and Retrieve Messages:

POPControl.MailServer = "MyPOPServer" POPControl.User = "username" POPControl.Password = "password" POPControl.Connect() POPControl.MessageNumber = 1 MessageText = POPControl.MessageText MessageHeaders = POPControl.MessageHeaders

This property is read-only.

SPOP.MessageTo Property

This property includes the value of the To header of the last retrieved message.

Syntax

getMessageTo(): string;

Default Value

""

Remarks

This property contains the value of the To header of the last retrieved message. The same information also may be retrieved through the Header event.

This property is read-only.

SPOP.Password Property

This property includes the password for the mailbox user.

Syntax

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

Default Value

""

Remarks

This property contains the password for the mailbox user. This property must be set before the class connects to the MailServer.

SPOP.SignerCert Property

This property contains the certificate of the message signer.

Syntax

getSignerCert(): Certificate;
setSignerCert(signerCert: Certificate): void;

Default Value

Remarks

This property contains the certificate of the message signer. When calling VerifySignature or DecryptAndVerifySignature, this property will contain the certificate of the sender, if attached.

To verify messages without an attached certificate, set this property before calling VerifySignature or DecryptAndVerifySignature.

SPOP.SignerCertChain Property

This property includes the certificate chain of the signing certificate.

Syntax

getSignerCertChain(): CertificateList;

Default Value

Remarks

This property contains the certificate chain of the signing certificate. When calling VerifySignature or DecryptAndVerifySignature, this property will be populated with the certificate chain of the sender if attached.

Note: The SignerCert property will contain the signing certificate. The certificates in the signing certificate's chain will be placed in this property's collection.

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

SPOP.SigningAlgorithm Property

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

Syntax

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

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.

SPOP.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.

SPOP.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.

SPOP.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.

SPOP.SSLProvider Property

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

Syntax

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

enum SPOPSSLProviders {
  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.

SPOP.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.

SPOP.SSLStartMode Property

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

Syntax

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

enum SPOPSSLStartModes {
  sslAutomatic,
  sslImplicit,
  sslExplicit,
  sslNone
}

Default Value

3

Remarks

The SSLStartMode property may have one of the following values:

SPOP.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.

SPOP.User Property

This property includes the user identifier for the mailbox.

Syntax

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

Default Value

""

Remarks

This property contains the user identifier for the mailbox. This property must be set before the class connects to the MailServer.

SPOP.checkMessageEncrypted Method

This method checks whether or not the current message is encrypted.

Syntax

async spop.checkMessageEncrypted(): Promise<boolean>

Remarks

This method is used to check whether or not the current message is encrypted. This method will return True, if the current message appears to be encrypted, according to the value of OutputMessageHeaders.

SPOP.checkMessageSigned Method

This method checks whether or not the current message is signed.

Syntax

async spop.checkMessageSigned(): Promise<boolean>

Remarks

This method is used to check whether or not the current message is signed. This method will return True, if the current message appears to be signed, according to the value of OutputMessageHeaders.

Note: A message that is both signed and encrypted will not appear to be signed until after it is decrypted.

SPOP.config Method

Sets or retrieves a configuration setting.

Syntax

async spop.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.

SPOP.connect Method

This method connects to the mail server and attempts to log in.

Syntax

async spop.connect(): Promise<void>

Remarks

This method connects to the mail server and attempts to log in using the current User and Password. Then it retrieves the initial statistics about the mailbox contents (MessageCount and QueryTotalSize).

Example. Connect to POP Mailbox:

POPControl.MailServer = "MyPOPServer" POPControl.User = "username" POPControl.Password = "password" POPControl.Connect() POPControl.MessageNumber = 1 POPControl.Retrieve() MessageText = POPControl.MessageText MessageHeaders = POPControl.MessageHeaders

SPOP.decrypt Method

This method decrypts the current Message .

Syntax

async spop.decrypt(): Promise<void>

Remarks

This method attempts to decrypt the encrypted message using the certificate in Certificate.

SPOP.decryptAndVerifySignature Method

This method decrypts and verifies the signature of the current message.

Syntax

async spop.decryptAndVerifySignature(): Promise<void>

Remarks

This method attempts to both decrypt and verify the signature of the message. All of the properties affected by calling the Decrypt and VerifySignature methods are affected in the same manner.

Note: This function does not attempt to check the validity of the signing certificate.

SPOP.delete Method

This method deletes a message specified by MessageNumber on the server.

Syntax

async spop.delete(): Promise<void>

Remarks

This method asks the MailServer to delete the message specified by MessageNumber. The message will not actually be deleted from the server until the connection is closed. To cancel a previous Delete, use the Reset method.

SPOP.disconnect Method

This method disconnects from the mail server.

Syntax

async spop.disconnect(): Promise<void>

Remarks

This method makes the class disconnect from the MailServer by sending the QUIT command. If successful, all changes to the mailbox are committed by the server. Otherwise, changes are rolled back to the initial state that the server was in before the connection.

SPOP.doEvents Method

This method processes events from the internal message queue.

Syntax

async spop.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.

SPOP.interrupt Method

This method interrupts the current method.

Syntax

async spop.interrupt(): Promise<void>

Remarks

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

SPOP.listMessageSizes Method

This method retrieves a list of all message sizes from the server.

Syntax

async spop.listMessageSizes(): Promise<void>

Remarks

This message retrieves a list of all message sizes from the server. For each message listed, a MessageList event will fire containing the number and size of the message.

SPOP.listMessageUIDs Method

This method retrieves a list of all message UIDs from the server.

Syntax

async spop.listMessageUIDs(): Promise<void>

Remarks

This method retrieves a list of all message UIDs from the server. For each message listed, a MessageList event will fire containing the number and UID of the message.

SPOP.localizeDate Method

This method converts a valid RFC 822 message date to a local date and time.

Syntax

async spop.localizeDate(dateTime : string): Promise<string>

Remarks

This method can be used to convert an RFC 822 date and time string to the corresponding local date and time.

Note: Dates will be returned in the format: "MM/dd/yyyy hh:mm:ss".

SPOP.queryMessageSize Method

This method returns the size in bytes of the current message.

Syntax

async spop.queryMessageSize(): Promise<number>

Remarks

This method queries the server for the size in bytes of the message specified by MessageNumber. The method returns the size (in bytes) of the message.

If the class is not connected, or MessageNumber does not contain a valid message number, the return value is 0. Otherwise, it returns the size of the mail message (including headers) as reported by the server.

The MailServer is asked about the size of the message only if the MessageNumber property has changed. If MessageNumber has not changed, the class returns a cached value.

SPOP.queryMessageUID Method

This method returns the unique identifier (UID) of the message as specified by the server.

Syntax

async spop.queryMessageUID(): Promise<string>

Remarks

This method returns the unique identifier (UID) of the message specified by MessageNumber. If the class is not connected, or MessageNumber does not contain a valid message number, the return value of this method is an empty string. Otherwise, it returns the UID of the mail message as reported by the server.

The MailServer is asked about the UID of the message only if the MessageNumber property has changed. If MessageNumber has not changed, the class returns a cached value.

SPOP.queryTotalSize Method

This method returns the cumulative size in bytes of messages in the mailbox (including headers).

Syntax

async spop.queryTotalSize(): Promise<number>

Remarks

This method returns the cumulative size in bytes of messages in the mailbox (including headers). When the class is not connected to the server, the return value of this method is 0. When connected, it returns the cumulative size of all the messages in the mail box as reported by the POP server.

SPOP.reset Method

This method resets all changes and revert back to the state when the user first connected.

Syntax

async spop.reset(): Promise<void>

Remarks

This method is used to reset all changes and revert back to the state when the user first connected. Asks the MailServer to reset all changes and revert back to the state it was when connected.

SPOP.retrieve Method

This method retrieves a message specified by MessageNumber from the server.

Syntax

async spop.retrieve(): Promise<void>

Remarks

This method is used to retrieve a message specified by MessageNumber from the server. It asks the MailServer to retrieve the message specified by MessageNumber. The message headers will arrive in the Header event, and the message text will arrive in the Transfer event.

The MaxLines property defines the number of lines retrieved.

Example. Connect and Retrieve Messages:

POPControl.MailServer = "MyPOPServer" POPControl.User = "username" POPControl.Password = "password" POPControl.Connect() POPControl.MessageNumber = 1 POPControl.Retrieve()

SPOP.retrieveHeaders Method

This method retrieves headers for a message specified by MessageNumber .

Syntax

async spop.retrieveHeaders(): Promise<void>

Remarks

Calling this method will retrieve the headers for the message specified by the MessageNumber property. The message headers will be provided by the Header event and also stored in the MessageHeaders property.

Example. Connect and Retrieve Message Headers:

POPControl.MailServer = "MyPOPServer" POPControl.User = "username" POPControl.Password = "password" POPControl.Connect() POPControl.MessageNumber = 1 POPControl.RetrieveHeaders()

SPOP.sendCommand Method

This method sends the exact command directly to the server.

Syntax

async spop.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.

SPOP.verifySignature Method

This method verifies the signature of the current message.

Syntax

async spop.verifySignature(): Promise<void>

Remarks

This method attempts to verify the signature of the input message. If the message does not have a certificate attached, the class will attempt to verify the signature using the certificate supplied in SignerCert (if any). If no certificate is found, the class .

If this method is successful, the SignerCert property will contain the certificate information of the message signer.

Note: This function does not attempt to check the validity of the signing certificate.

SPOP.ConnectionStatus Event

Fired to indicate changes in the connection state.

Syntax

spop.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:

SPOP.EndTransfer Event

This event is fired when the message completes transferring.

Syntax

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

Remarks

The EndTransfer event is fired when the message body completes transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

SPOP.Error Event

Fired when information is available about errors during data delivery.

Syntax

spop.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.

SPOP.Header Event

This event is fired for every message header being retrieved.

Syntax

spop.on('Header', listener: (e: {readonly field: string, readonly value: string}) => void )

Remarks

The Field parameter contains the name of the header (in the same case as it is delivered). The Value parameter contains the header contents.

If the header line being retrieved is a continuation header line, then the Field parameter contains "" (empty string).

SPOP.MessageList Event

This event is fired for every message listed by ListMessageSizes and/or ListMessageUIDs .

Syntax

spop.on('MessageList', listener: (e: {readonly messageNumber: number, readonly messageUID: string, readonly messageSize: number}) => void )

Remarks

When ListMessageSizes is called, MessageSize is valid, and MessageUID is always an empty string.

When ListMessageUIDs is called, MessageUID is valid, and MessageSize is 0.

SPOP.PITrail Event

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

Syntax

spop.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:

SPOP.SSLServerAuthentication Event

Fired after the server presents its certificate to the client.

Syntax

spop.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.

SPOP.SSLStatus Event

Fired when secure connection progress messages are available.

Syntax

spop.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.

SPOP.StartTransfer Event

This event is fired when the message starts transferring.

Syntax

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

Remarks

The StartTransfer event is fired when the message body starts transferring from the server to the local host.

The Direction parameter shows whether the client (0) or the server (1) is sending the data.

SPOP.Transfer Event

This event is fired when the message is transferred from MailServer .

Syntax

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

Remarks

The Text parameter contains the portion of the message data to be retrieved.

The BytesTransferred parameter contains the number of bytes transferred since the beginning of the message, including header bytes. At the end of transmission (i.e., when the last Transfer event is fired), BytesTransferred equals the value of the QueryMessageSize method.

The Transfer event is fired for every line of the message. For complete lines, there is no terminating newline at the end of the Text parameter, and EOL is True. The EOL parameter is False when a line is broken (usually for being too long).

A faster way to retrieve a message is to assign a value to the LocalFile property and use the Transfer event to check the progress rather than to get the actual data.

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.

Note: For the PercentDone parameter value to be correct, the GetMessageSize configuration setting must be set to True.

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);

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 ipworkssmime.spop)

POP 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 ipworkssmime.spop)

POP Errors

TCPClient Errors

SSL Errors

TCP/IP Errors