ietf-smtp
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Re: reject vs bounce

2005-09-13 04:21:46

On Tue, 13 Sep 2005, Hector Santos wrote:

MDA - Mail Destination Agent

I believe the traditional expansion of MDA is Mail Delivery Agent. This is
the entity that performs "final deliery" per RFC 2821, i.e. which adds the
Return-Path: field and dumps the message in the mail store. Examples of
separate MDA software include procmail, or the Cyrus lmtpd and deliver
programs. Alternatively the MDA can be built into the final MTA, as in
Exim. The interface between the final MTA and the MDA is often a local
convention, or it may be a standard like LMTP. MDAs often have facilities
for programming the disposition of messages, e.g. using Sieve, and these
facilities usually allow the message to be redirected (in the aliasing /
forwarding sense).

Tony.
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