LMTP

From Free net encyclopedia

The Local Mail Transfer Protocol or LMTP is a derivate of SMTP, the Simple Mail Transfer Protocol. LMTP is designed as an alternative to normal SMTP for situations where the receiving side does not have a mail queue, such as a Mail Delivery Agent that understands SMTP conversations.

LMTP is an application layer protocol, which runs on top of TCP/IP.

A LMTP conversation uses the same commands as a SMTP conversation, but rejects a receipient if delivery is not immediately possible. This removes the need for a mail queue. For this reason, one is not supposed to run an LMTP server on the TCP/25 port.

Related RFC

• RFC 2033 — The Local Mail Transfer Protocolde:LMTP