60 Seconds of WIP, 3 August 2023
Today’s snippet is from Run Your Own Mail Server, discussing LMTP versus dovecot-lda(1).
Once multiple messages start arriving simultaneously it’s much more efficient to use a dedicated daemon for local delivery, via the Local Mail Transport Protocol (LMTP).
Why have a separate protocol for local email? LMTP is a heavily trimmed-down version of SMTP. LMTP doesn’t need queues; either it delivers the message to the user’s inbox and reports success, or can’t deliver and reports an error. All queuing takes place on the SMTP level. LMTP is designed for trusted environments, so it has no…
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