Once upon a time, Edgaras Lukoševičius <edgaras.lukosevic...@gmail.com> said: > What I need is to make smtp authentication balanced and keep everything in > backend (private network)
If you have more than one Postfix server, each one must talk to its own private Dovecot server for auth. The Dovecot auth protocol includes a client (Postfix) assigned ID, and Postfix uses the process ID. If you have multiple Postfix servers talking to one Dovecot server, you'll get ID conflicts and dropped auths. I ended up putting a local instance of Dovecot on each Postfix server, with no protcols configured except for auth. Not quite as HA, but I have my monitoring system doing SMTP AUTH (never have had a problem with the setup); you could probably have HAProxy do it as well (IIRC it can do some basic expect-style send/receive). -- Chris Adams <c...@cmadams.net>
