Security Basics mailing list archives

Re: educating rDNS violators


From: Mark Reis <mcr2z () cs virginia edu>
Date: Wed, 25 Aug 2004 21:36:12 -0400

A question for those who have implemented rDNS restrictions.

In the case of a mail server with roaming users, how do you deal with roaming users? A majority of our users travel to conferences and use secure IMAP and SMTP to send their mail. Perhaps this is a misconception, but I thought that some mail clients attempt to portray themselves as a SMTP server relaying through the main mail server. If we have users off traveling and having their email is blocked while they were connected at a hotel with bad rDNS entries, I'd be getting ticked off calls.

Any suggestions?

Thanks,
Mark

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