Local Mail Transfer Protocol (LMTP)
Overview
Local Mail Transfer Protocol ("LMTP") is
From RFC2033:
Although LMTP is an alternative protocol to ESMTP, it uses (with a few changes) the syntax and semantics of ESMTP. This design permits LMTP to utilize the extensions defined for ESMTP. LMTP should be used only by specific prior arrangement and configuration, and it MUST NOT be used on TCP port 25.
Related Concepts
LMTP relates to:
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ESMTP, as it is a derivative thereof