Corey Hickman via Postfix-users skrev den 2023-05-04 14:18:
We have 3 smtp servers for sending messages. When mail in one server
has delivery issue, how can we setup it to use another more servers
for second/third delivery?
retroisk answer, when postfix maillist was on cloud9, it had 3 ipv4, 3
ipv6, and i have newver seen mails that was remotely tempfailed used
another ip in cloud9, why this ?
answer to my own question is greylist
back to you, what do you like to get ?
problem is that when mails is in one queue, it have to stay there until
delivered, if you move it forward to another of your servers its
delivered, and can give backscatter back to original senders with can
also be forged senders, if not carefull setup
maybe https://gitlab.com/fumail/pfqd can be used to let all see where
there is minimal queue files, and other pickup services can use this
info to not send new mails to a fully loaded server ?
room for implemention for postfix developpers
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