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1. In the Virtualize Server view, choose the virtual asset you want to configure to use with the custom message listener.
2. Choose Transports> Transports > Custom in the Virtual Asset Deployment Settings. If multiple listeners are installed, choose choose SMTP Listener from the Select Implementation menu.
3. Configure the connection and security settings (see Configuration).
    
4. Save your changes.

Messages

For each email that it receives, the SMTP Listener will create three request messages for responders.

One: an XML document detailing who sent the email. This makes it easier to set up responders based on the email's sender. For example:

<SMTP>
 <From>[email protected]</From>
</SMTP> 

Two: an XML document detailing the email's recipients. This makes it easier to set up responders based on the email's recipients. For example:

<SMTP>
 <Recipients>
  <Recipient>[email protected]</Recipient>
 </Recipients>
</SMTP> 

Three: the complete email. For example:

Received: from hostname (localhost [127.0.0.1])
        by hostname
        with SMTP (SubEthaSMTP null) id M4LMIVYQ
        for [email protected];
        Thu, 12 Dec 2024 09:[MASKED]9:22 -0800 (PST)
From: [email protected]
To: [email protected]
Message-ID: <1[MASKED]1973616[MASKED].0.1734026361923.JavaMail.hostname>
Content-Transfer-Encoding: 7bit
Subject: Testing Subject
MIME-Version: 1.0
Content-Type: text/html; charset=us-ascii



This is a Text Message. 

Responders can return a response at any step. Responses are treated as error messages sent back to the client and can be a text message, an error code and a text message, or just an error code.

Error message example:

Transaction failed 

Error message with code:

450: The requested mail action was not taken because the mailbox is unavailable

Configuration

A Literal Message Responder with an empty payload should be configured for the SMTP listener to accept incoming messages.

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