On 6/10/2014 3:39 PM, Wietse Venema wrote: > Kai Krakow: >> BTW: In this context, what's the best approach to put mailboxes on a >> separate machine? Let the LDA drop mails into NFS mounts, or let postfix >> transport the mails via transport_map into a machine which hosts the LDA >> (dovecot in our case)? > > I recommend Dovecot via LMTP, but NFS would work, too, assuming one > file per message. I can't say which approach would handle the most > load.
Dovecot's LMTP and LDA both perform index updates during delivery to the mailbox. They also enable Sieve. Dovecot's speedy performance is due in large part to its indexes. If you use the Postfix LDA to drop mail directly into maildir files, Dovecot will need to stat the new files to update its indexes, before responding to a LIST command. On a busy server this can be expensive, and responsiveness at the MUA may be sluggish. Thus I concur with Wietse. Use LMTP for performance, and to enable Sieve scripting. Cheers, Stan
