"Martin Burgraf" martin.bg@web.de writes:

According to http://wiki2.dovecot.org/LDA the recommended way is to use LMTP, since it's supposed to have a better performance.

The performance gains comes mostly from avoiding the overhead of invoking an executable and spawning a new process for each delivery. If your mail system isn't stressed, I don't think it matters much.

On the other hand, http://wiki2.dovecot.org/LMTP says, that LMTP is a backgound process, while LDA is only called when needed. I've also read, that LDA only uses the users privileges, which both means, that LDA should be better.

I don't know why you would consider a background process inferior to a run-on-demand executable.

I've also noticed, that LMTP adds an additional Recieved:-Header to the mail. Are there any other differences?

From a past discussion on this topic, I think Timo stated that if you use SIS (single-instance storage or de-duping), it's more efficient using LMTP since it knows all message bodies to multiple recipients will be identical.

Joseph Tam jtam.home@gmail.com