[SATLUG] uh, kinda afraid to ask :-) (mail server a/ptr record question)

Matt Valdes mattvaldes at satx.rr.com
Mon Feb 12 10:24:30 CST 2007


On Monday 12 February 2007 10:01, John Pappas wrote:

> FWIW, several Web-hosting providers as well as some of the anti-spam
> engines require that the MX = A (not CNAME) = rDNS, otherwise it is assumed
> spam, since a legit email server should be set up that way, esp since it
> requires some level of admin knowledge to accomplish (as mentioned above).
> John

This is part of RFC 1912, Section 2.1
http://tools.ietf.org/html/rfc1912

Matt


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