Implement the LISTSERV spam exit routine. You can examine anything you
want about the incoming message because your routine is given the entire
incoming message.

I did it on a Windows platform with REXX script.  The example in the
documentation shows how to feed inbound mail to SpamAssassin, and I did
that, but included a lot of my own detection logic too. When one is
well-acquainted with the usual traffic, some fairly precise recognition
of spam is possible.

Note this is a Site Administrator task, not a List Owner task.

On 11/21/2011 1:08 PM, Hal Keen wrote:
> From: <[log in to unmask]>
>>
>> Put Listserv behind a spam filter.
>
> Thanks, but unfortunately that's another non-solution. We're a worldwide
> standards working group, and the supposedly reputable spam filtering
> installed at the IEEE has a nasty tendency to block specific
> participants, e.g. for being Japanese. The staff imposes it on the lists
> every few years, and I have to hammer on them to take it off again.
>
> What I'd really like would be the ability to write filters for
> Content-Type entries in MIME headers, the way we can filter for specific
> header-line categories in email headers.
>
> Hal Keen

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