North American Network Operators Group
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Re: SMTP addresses in <>

  • From: Donald Stahl
  • Date: Fri Jan 04 11:29:39 2008 

RFC 1122 (Requirements for Internet Hosts - Communication Layers)
section 1.2.2 (Robustness Principle):

               "Be liberal in what you accept, and
                conservative in what you send"
Which has done nothing but allow countless Exchange server to HELO with exchange.local and other such idiocy, not to mention contribute to the spam problem.

Every time you try to configure your server for strict parsing to help block spam, you get an email from some admin who doesn't know the first thing about SMTP but wants to know why you're blocking their email.

-Don