[Mimedefang] Powerful anti-spam rule that never discards vali d e-mail

[local.mimedefang]

On Mon, 13 Jan 2003 13:23:24 -0000, dfs at roaringpenguin.com ("David F.
Skoll") wrote:

>On Mon, 13 Jan 2003, local.mimedefang wrote:
>
>> Does the spam software always use the same envelope sender address? If
>> so then presumably only the first person to use that software would
>> see their mails tempfailed - second and subsequent users would benefit
>> from the envelope sender now being in the database.
>
>It's configurable whether you match just on the sender address, or on
>the combination of sender and recipient.
>
>In my logs, the sender address appears to be different each time.  If the
>spam software always used the same sender address, it would be dead easy
>to block. :-)

Hmm. I'm wondering how effective it would be to set up a mail
relay with a higher priority than the "real" ones which does nothing
but tempfail *everything*. It shouldn't be too hard to write but
I'm a bit loath to try it on a real domain, especially one which
belongs to my employer!