So are you saying that the RDNS results at dnsstuff for bullhorn.com don't matter? They do indeed generate a failure, but I'm unclear as to whether this is a test an actual mail server would use.
That is correct, in this case. Specifically, the E-mail is being sent from an IP other than the one(s) in the MX record. If the IP address(es) that are actually sending the mail have reverse DNS, AOL will happily accept the mail. Unless there is another problem, as is the case here (AOL apparently received spam complaints from users).
All our mail comes from outbound3.bullhorn.com, but this is not a registered mail server for bullhorn.com. This is because we have seperate incomming and outgoing mail servers. Would AOL look at our connecting mailserver (outbound3.bullhorn.com) and do an MX lookup for bullhorn.com?
No.
If so, outbound3.bullhorn.com would not be one of the servers that came back. Is this what they mean by a RDNS failure?
No.
Is it ok to have seperate incomming and outgoing email servers in general?
Yes.
However, it does worry me that you are completely overlooking this:
>>Diagnostic-Code: smtp;554-: (RLY:BD) >>http://postmaster.aol.com/guidelines/bulk_email.html The mail server you >>are using to send mail to AOL has been identified as a source of spam. If >>you believe this message is in error, please have your mail administrator >>contact AOL at 888-212-5537. > >AOL is telling you that your IP has been identified as a source of >spam. That's the problem.
AOL you identified you as a spammer, yet all you seem to be concerned about is your reverse DNS entry. Please re-read and then re-read again the above details.
-Scott
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