>Can anyone point me to any RFC's that may specify that mail servers should >have properly configured DNS including reverse delegation.
>RFC's. I am seeing a lot of rejects since I enabled the reject unknown >client feature last week to stop a heap of spam getting past my IMGATE >boxes. I now need to make a decision whether to leave the config as is or >take out my changes. most MXs would like to but can't reject_unknown_client because too many legit servers have no PTR. I think that makes the no-PTR servers illegit. They are illegit by AOL's policies. >Believe it or not, even one of the banks does not have reverse delegation >for at least one of their mail servers. If we can't get the big companies to >maintain their DNS what chance do we have for the small companies. none. The large %age of legit servers with bad (but simple and old) PTR is why the new, and more complicated SPF is dead in the water as a basis for rejecting mail. Len
