I can't seem to find a configure setting in
main.cf where I can get failed delivery notices to be sent to the sender of the failed mail. Currently there is no indication of weather a mail has actually been sent or not.
I thought maybe it's because the delivery agent is separate from postfix, and was under the impression that it would then be procmail, but there is no .promailrc file on my system with is running CentOS 5.5.
I've tried to send test mails to non-existing addresses assuming they would then remain in the queue being unsent, but when I check the queue it's always empty. Have tried looking in
/var/log/maillog also and see no evidence of failed deliveries.
GMAIL however bounces one of our domains which seems to the blacklisted, that shows in the
maillog but no failed delivery message is sent back to the sender who then never has any indication that the mail has been bounced and not reached it's destination.