Eugene V. Boontseff, September 18, 2010 5:10 PM
CheckRelayRecipient = reject_unverified_recipient, permit
If the main destination server is not working, mail is rejected with the
folowing reason:
Recipient address rejected: unverified address: connect to host.domain.tld
[xx.xxx.xxx.xx]:25: Connection refused
reject_unverified_recipient defaults to a 450 reject. So the sending server should just try again later, just like if
the mailbox was full.
But here is what I do:
transport_maps = destination_for_each_domain
relay_recipient_maps = list_of_valid_recipients
lots_of_tests, reject_unauth_destination, reject_unlisted_recipient, lots_of_other_tests, reject_unverified_recipient,
permit
The final reject_unverified_recipient, prevents me from accepting and bouncing mail for users that always have full
mailboxes.
