At 11:07 1/13/2004, Jeffrey Laramie wrote:
> >True. However, most RDNS checks today are to determine that a mail server
> >(ie. a connecting IP address) *has* a PTR record, not to match the PTR
> >record with the HELO or MAIL FROM domain.
>
>Interesting. Does XMail compare domains or does it just check for
>existence of the PTR record? I don't think I've ever seen this
>documented anywhere.

The RDNS check in XMail is a simple "does this IP address have a PTR 
record", as far as I know.

I've done some additional coding to test the returned DNS name against a 
list of known spam DNS names on my own system... 


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