>I noticed the subject line in my previous post said MISSING_REVERSE_DNS!
>
>I just checked both of my mail servers for reverse DNS entries and they
>seemed fine:
>
>
>http://www.dnsstuff.com/tools/ptr.ch?ip=mail.earthsciences.net
>
>http://www.dnsstuff.com/tools/ptr.ch?ip=navigw.earthsciences.net
The problem is that your E-mail came from 63.172.241.62, not
mail.earthsciences.net or navigw.earthsciences.net.
For 63.172.241.33 (navigw.earthsciences.net), Sprint returns a "No error"
code, a CNAME value, and the nameserver where that CNAME value can be
looked up. That's fine.
For 63.172.241.62, however, Sprint returns a "This host does not exist"
error, a CNAME value, and a SOA record for earthsciences.net. The "This
host does not exist" error means that Sprint is saying that the revese DNS
entry for 63.172.241.62 doesn't exist (although it's doing it in a weird way).
-Scott
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