[SOLVED] Queue Incoming Mail During Upgrade

[leog21]

Has anyone setup a Postfix server to queue up the incoming mail while zimbra is down during an upgrade? Some mail servers only try once to send mail to a recipient and give up. I need an upgrade strategy that will ensure no mail is lost.

Thanks,
Leo

[lytledd]

Has anyone setup a Postfix server to queue up the incoming mail while zimbra is down during an upgrade?

Yes, it's quite simple.

We run ASSP for spam filtering, so have a Linux machine at the perimeter. I have postfix setup to queue when I do upgrades. You only need to add 1 line in the main.cf:

relayhost = ip_address_of_mail_server

And restart postfix. If it can't deliver, it'll queue until it can. To speed along the flushing, you can run postqueue -f to flush, once the upgrades are complete.

Doug