LDA versus LMTP

Bertrand Caplet bertrand.caplet at chunkz.net
Sat Jun 13 14:10:09 UTC 2015

>>> On Thu, 11 Jun 2015 15:14:31 -0400, Ajai Khattri <symbiat at gmail.com>
>>> wrote:
>>>> Im using Dovecot for LMTP for all my mail users, since this way they are
>>>> completely virtual (i.e. dont need to have a local account at all), all
>>>> mail gets delivered to Maildirs owned by dovecot. Also LMTP makes it easier
>>>> to insert scripts and do any custom processing which presumably is where
>>>> Sieve comes in. Its also pretty easy to setup.
>>> Sounds like that's what I should be doing. OK, so how is Dovecot told
>>> to use LMTP instead of LDA? I must not be understanding something
>>> about what's in either 15-lda.conf or 20-lmtp.conf.
>> You have to configure your mta to deliver to lmtp instead of lda.
> So this gets done in Postfix then?

the main differences LDA can be used thru unix socket or TCP socket.
TCP socket can be used for multiple smtp servers deliver to an unique
dovecot server.
And LMTP is easier to debug and put info in headers like this :

Received: from mx02.chunkz.net
	by lmtp02.chunkz.net (Dovecot) with LMTP id JoInCcG8elUUUgAAt5Imuw
	for <bertrand.caplet at chunkz.net>; Fri, 12 Jun 2015 13:04:34 +0200

This also been answered on Postfix ml see here :

CHUNKZ.NET - script kiddie and computer technician
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