We do not allow resolves to IP - All IP are in stealth mode and we never
have these issues with other domains.

Everything works fine...

Danny

-----Original Message-----
From: David Morris [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 19, 2006 5:20 PM
Cc: GnatBox Users Group
Subject: Re: [gb-users] Why are our emails being blocked as SPAM?

And the originating IP reverse resolves to: ydyn.com which also doesn't
resolve.

For many / most anti-spam solutions three configuration issues are
important:
  a.  The HELO name reported by your server should be valid AND
      resolve to the IP Address mail is sent from
  b.  Reverse lookup of the IP address needs to match the
      forward name

These rules keep getting tightened. I finally had to stop using the
GnatBox DNS because I couldn't figure out how to get it to process my
ISPs CName delegation for the PTR record. AOL started refusing to accept
my email.

Could be that GTA is testing a new version of their anti spam filtering.
So it stopped working for your mail.

If you check your from IP with the black list search services, I'm sure
you'll find your mail will be blocked. I use www.dnsstuff.com, but it
seems like they are often overloaded and the server returns nada.

On Tue, 19 Sep 2006, Jason Sopko wrote:

> Cox, Danny H. wrote:
> > Here is the NDR (below) we got from GTA...  Note the "Rejected as
spam".
> >
> >
> It's most likely because the host name of your mail server
> (ms01.ydyn.com) doesn't resolve.

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