>What about adding a return address checker?
The MAILFROM test checks the return address, to make sure that it is on a
valid domain (one that can receive E-mail).
>A. If the persons address does not exist do something...
> (I mean this should check the FROM address.)
>
>B. If the domain name in the e-mail address does not exist do something..
> (not a test using rev dns, but something that checks Domain Names.)
B is possible now, using the MAILFROM test (although it checks the return
address, not the From: address).
A is not possible, as you can not determine for certain if the E-mail
address exists (and, it requires a lot of overhead to make a good guess as
to whether or not it exists, as it requires making a TCP/IP connection and
sending several commands back and forth).
-Scott
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