BURL MTA options

The BURL extension to SMTP SUBMIT is defined in RFC 4468 (Message Submission BURL Extension). The MTA&#x27;s SMTP SUBMIT server can support this extension, if configured to do so.

Configuration of BURL support involves setting the two MTA options  and , as well as configuring the   mapping table. The BURL MTA options  and   specify the credentials for the MTA to use when it connects to the IMAP server as the "submit" user, so of course these credentials (these MTA option settings) must match those configured for the IMAP server&#x27;s "submit" user as configured via the   IMAP option.

See also:
 * imap_password MTA Option
 * imap_username MTA Option
 * BURL_ACCESS mapping table
 * submituser Option
 * MTA URL types
 * MTA options
 * SMTP SUBMIT servers