> > If Exim tries to deliver a message to a remote server and gets a 5xx > code back, say 550 no such user, am I right in thinking the message > should fail right away with an NDR, not remain on the queue being > re-tried?
Yes. The remore system has sent a permanent rejection response back, the email should be regarded as unable to be delivered. > > More sticky, if a remote server refuses connections from Exim - say it > is firewalling off the connecting ip, should that fail at once or stay > on the queue for x hours? Exim should queue mail for the remote server - based on the retry time rules defined. John -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
