local mail transfer protocol

from The Free On-line Dictionary of Computing (8 July 2008)

Local Mail Transfer Protocol
LMTP

   <messaging, protocol> (LMTP) A {protocol} designed as an
   alternative to {ESMTP} for cases where the mail receiver does
   not manage a queue.  LMTP is an {application level} {protocol}
   that runs on top of {TCP/IP}.  It was initially defined in
   {RFC 2033}, and uses (with a few changes) the syntax and
   semantics of {ESMTP}.  It should be used only by specific
   prior arrangement and configuration, and it must not be used
   on TCP {port} 25 (the {SMTP} port).

   (2002-03-09)