Yes, it's quite simple.
Originally Posted by leog21
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:
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.
relayhost = ip_address_of_mail_server
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."