On Wed, 18 Mar 2026 21:33:08 -0400 "John Stoffel" <[email protected]> wrote:
> So I'm not sure how well this is going to really work for you, since > now you will have email showing up at one server or another, though if > you setup the primary with the lower MX value it will get almost all > the emails. But you'll still have users checking email on both > mailboxes looking for emails. 15 minutes is a long time these days. > > I'd strongly suggest you don't do this unless you really really need > to do it. > > John Have you implemented this before and ran into specific issues? If yes, then I would be interested to learn what they were, so I can look into them. Duplicating Postfix + Dovecot state on both mail severs is precisely the point of this design. I don't mind if they are out of sync by 15 minutes or so, as long as eventually all state is correctly replicated across. This avoids complex clustering solutions (e.g. Dovecot Pro) and provides simple redundancy. I prefer an active-active architecture, since I still have to pay for the second VM and it may as well do something useful and handle the load. I think mail relay/submission should be OK on either mail server. The only issue could be with IMAP mailboxes and inconsistent views when connecting to different servers at different times. I can probably solve this by advising to only use the primary IMAP server all the time and the secondary in case of connectivity issues. Or simply wait 15 minutes for replication to complete if some emails appear as if they suddenly disappeared. _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
