[Mimedefang] Powerful anti-spam rule :-)
Kris Deugau
kdeugau at webhart.net
Thu Nov 7 13:55:01 EST 2002
"David F. Skoll" wrote:
> In the development of CanIt, I've discovered a really powerful
> anti-spam rule:
>
> For the following domains:
>
> aol.com
> earthlink.net
> hotmail.com
> yahoo.com
>
> Reject mail unless the relay machine resolves to one whose name
> ends in the same domain.
There's at least one MSN mailing list with a Hotmail return address
which is not actually mailed through a Hotmail server. I had upped the
score for a forged Hotmail "Received" header in SpamAssassin, and got a
number of messages from customers who were signed up for that list.
And, of course, I then had to whitelist that address for those users.
:/
-kgd
--
Money is overrated.
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