Hi guys, I have a couple of quick questions:
1) How long does a message sit in the postfix queue for before it attempts a redeliver (a deffered message sat in the deffered queue)? 2) If you have a mailserver (postfix, dovecot, virtual users/domains mysql) and you have a back-up MX record set if the main mailserver goes down (reboot) and a mail gets sent to a domain hosted on the server, it gets no response from the main mailserver so reverts to the backup. It delivers the mail to the backup and then defers it because it cannot be sent to the main mailserver, it then sits in the deferred queue until the main mailserver is back and gets delivered. wonderfull... the question is, if the server is down due to a reboot for whatever reason so say 5 - 10 minute downtime. The original message will be sent, goto the backup mx, it will get deferred until mailserver is backup then delivered... BUT I tested this with hotmail, and what I get is, hotmail defers the message as well as sending it to the backup mx, so that when the backup mx delivers the mail which goes through fine, hotmail are retrying as well, and you end up with two of the same message? How do you overcome this? Kind Regards, Dusty.
