On Fri, 2012-03-30 at 21:37 +0200, Patrick Westenberg wrote: > Nick Warr schrieb: > > > I think some of the new Dovecot (director?) software is user aware, but > > I don't know if it's quite ready for production. > > Yes, with director it should be something like that: > > MTA --(lmtp)--\ /--(lmtp)--> backend1 --\ > -- director -- -- NFS > MTA --(lmtp)--/ \--(lmtp)--> backend2 --/ > > > IMAP-User --> frontend1 --\ /--(imap)--> backend1 --\ > -- director -- -- NFS > IMAP-User --> frontend2 --/ \--(imap)--> backend2 --/
The director above must be the same one for both IMAP and MTA. > So what happens if us...@example.tld receives a mail? > > - The director decides to connect to backend1 which in turn stores > the mail on the NFS share and the index file locally? > > - Then, us...@example.tld connects to one of the frontends. Does the > director know that, earlier, this user received a mail and proxies him > to backend1 too? Yes. Director process actually doesn't know anything about mail protocols, it simply does username -> backend mapping. The regular Dovecot IMAP/POP3/LMTP/doveadm proxying code handles the rest.
