> > Note that 64.105.9.212 -- the IP you sent your E-mail from -- does have a
> > reverse DNS entry (see
> http://www.dnsstuff.com/tools/ptr.ch?ip=64.105.9.212 ).
>
>That is the IP of my server. The reverse DNS entry points to my ISP's DNS
>server (Covad), not mine.
That's correct. Note that they are returning a reverse DNS entry, so you
do have one. Although it may not be the one you want, the existence of a
reverse DNS entry is all that you are expected to have (very few, if any,
mailservers will require the reverse DNS entry to be anything specific --
except that it should have an associated A record).
>So let me get this straight--I should contact them, and tell them to fix the
>reverse lookup for 64.105.9.212 and have it point to my DNS server instead of
>theirs?
You don't have to, since they have a reverse DNS entry for your IP.
If you want, though, you can ask them to do that -- and then you could have
the reverse DNS entry served from your DNS server. The advantage is that
you would have full control over it (you could change it any time you
wanted, for example), but it would be more work.
-Scott
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