North American Network Operators Group
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Re: An A record is an MX record and is a missing MX....

  • From: Craig Partridge
  • Date: Thu Apr 03 17:14:40 2003 
In message <[email protected]>, "Gerardo Gregory" writes:

>Since then I have learned that some MTA's will look for an A record if it 
>cannot find an MX record and use the A record instead. 

That's indeed what the standard says.  I put it into RFC 973 after consulting
with Jon Postel about preferred ways to ensure robust delivery.

Craig