> Scappatura Rocco: > > I would like that sender domain names for which is not configured > > any MX record are not relayed from my MTA. I have tried to use the > > That would be a mistake. There is no RFC REQUIREMENT that a > domain has an MX record. >
I have no doubt about the correctness of what you stated above, but whenever a customer of mine sends a message through my MTA, specifying a sender with a domain that has not a valid sender (and, in particular, a domain sender with no MX defined and the message for some reason is not delivered), I receive a DSN for the customer that remain in deferred queue, just because it is destined to a recipient for which the domain has no MX defined. :-( What it could be the solution? Thanks in advance, rocsca
