Am 01. Feb, 2004 schw=E4tzte KevinO so:

> I do know that some mail servers are configured to do a reverse lookup of=
 the
> IP address of the sender.

The ISP should be checking that the sending IP belongs to one of their
blocks ( and is coming in on the appropriate interface ), and that the From=
:
addy is from one of their allowable domains. Hostname is 100% irrelevant.

Maybe even check that the From: addy belongs to the account currently
sitting on the IP.

ciao,

der.hans
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