GerBot - 8:52 am on Feb 11, 2006 (gmt 0) Interestingly I received this reply from dnsstuff:
I was about to write that I didn't see how an email IP list would have anything to do with SEO, but then I really don't know and I'm willing to try anything.
PTR [n/a: misc]MISSING! 18.104.22.168 has no reverse DNS entry; some mail servers may not accept your mail
PTR tests to see if you have a reverse DNS entry -- you SHOULD have one.
now this may have nothing to do with SEO or maybe it does either way it sounds like something I should fix and you never know - we may have found a new ranking variable :)
Interestingly I received this reply from dnsstuff: