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SMTP Server Description

Features | Detailed Description

Available in .NET, VCL and ActiveX editions.

The SMTP Server component is used for accepting and keeping emails from clients for further delivery to end recipients.

This component represents fully functional multithreaded server with the ability to customize the user and thread performance settings, supports all SMTP extensions according to RFC 821RFC 2821 and RFC 2554 protocols.

Using SmtpRelay component you can resolve MX exchanger for email recipients and relay emails sent to it.

You can use X.509 certificates for establishing the SSL / TLS secured connection.

See SSL / TLS support and Using certificates

With SMTP Server component you can enable debug log for showing entered commands and replies sent to the user.

Please see the Demos code (SmtpServer, SmtpServerSSL) and also the indexed Help documentation provided with the Clever Internet Suite installation for more details about using this component.

The most common members of the SMTP Server component can be seen below:

Property List

  Name   Description
 BatchSize Specifies the size of the transferred batch.
 CaseInsensitive Specifies whether the user account validation is case-insensitive.
 MaxRecipiets Maximum number of recipients allowed for the mail message.
 MaxThreadCount Gets or Sets the number of requests to the server that can be active concurrently.
 MinThreadCount Gets or Sets the number of idle threads the server maintains in anticipation of new requests.
 Port Specifies the port on which the SMTP server will listen to the user connections.
 UserAccounts Provides a list of SMTP server users which have allowed connecting to the SMTP server.
 UseAuth Makes the component use the Secure Password Authentication method during the connecting session.
 UseTLS Specifies whether the component should use the TLS / SSL security protocol.

Method List

  Name   Description
 Start Starts the SMTP server.
 Stop Stops the SMTP server.

Event List

  Name   Description
 OnAuthenticate Occurs when the SMTP server has accepred an authentication information from the user and needs to authorize or decline the connection.
 OnMailFrom Occurs when the client submitted the message sender address.
 OnMessageReceived Occurs when the SMTP server received the message from the client.
 OnRecipientTo Occurs when the client submitted the next message recipient.
 OnReceiveCommand Occurs when the SMTP server has received a command from the user.
 OnSendResponse Occurs when the SMTP server has sent a reply on the command being received earlier.
 OnServerError Occurs when an error is encountered when any action is performed.

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