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From: Wietse Venema (wietseporcupine.org)
Date: Fri Dec 07 2007 - 12:40:55 CST
> I have a policy service being served by two servers, so I've got a
> round-robin setup in DNS for e.g. "server.enidan.com". I can see the
> DNS lookup happening, and I see alternating IP-addresses being
> returned. Still, postfix is only ever using the same one?
Postfix does not use DNS to look up the server. Postfix uses
nsswitch.conf (or whatever its equivalent is on your machine).