Andrey -- please report this as a bug at http://bugzilla.SpamAssassin.org/
.  SpamAssassin can check alternative message-id headers, and should
do so in this case.

Also, please attach the full original message with Received headers
etc. to that bug.

I think it may already be fixed, but would prefer not to have the
issue be lost in the noise, which is what happens to bugs posted
to SpamAssassin-talk ;)

--j.

Andrey Koklin said:

> I think of enabling Spamassassin on my relay. With a bit of tuning
> for Russian specifics (e.g., disabling of 8bit header checks, which,
> so far, are commonly used here), seems, it works well, with a bit of
> exceptions...
> 
> As I see, FORGED_MUA_* header check is regarded as very severe sin,
> according to the assigned points. But, seems, there is a problem
> with its estimation, at least for some mail lists. E.g.:
> 
> ---------------------------------------------------------------------
> Content analysis details:   (6.50 points, 6.3 required)
> REFERENCES         (-0.5 points) Has a valid-looking References header
> MSG_ID_ADDED_BY_MTA_2 (1.0 points)  'Message-Id' was added by a relay
> FORGED_MUA_THEBAT  (4.3 points)  Forged mail pretending to be from The Bat!
> PLING_PLING        (1.7 points)  Subject has lots of exclamation marks
> 
> ------------------------- BEGIN HEADERS -----------------------------
> X-ListServer: CommuniGate Pro LIST 4.0.6
> List-Unsubscribe: <mailto:[EMAIL PROTECTED]>
> List-ID: <Fishka.soobcha.org>
> List-Archive: <http://soobcha.org:80/Lists/Fishka/List.html>
> Message-ID: <[EMAIL PROTECTED]>
> Reply-To: "Group Fishka from SoobCha project" <[EMAIL PROTECTED]>
> Precedence: list
> X-Mailer: The Bat! (v1.63 Beta/8)
> X-Original-Message-ID: <[EMAIL PROTECTED]>
> References: <[EMAIL PROTECTED]>
> [snip]
> -------------------------- END HEADERS ------------------------------
> 
> And there're several other mailing lists, which give the similar catch.
> 
> As it can be seen above, they rename the "Message-Id" field with
> "X-Original-Message-ID" and insert their own field insteed.
> Harmless enough thing, more, as CommuniGate Pro is widely used as
> ListServer, I expect big enough number of similar false matches.
> 
> What can be done here, with except of zero scoring of the checks?
> 
> Another question, do there exist a way to whitelist all incoming
> messages, if they seemingly go from a mailing list (i.e., have
> corresponding List- header fields). I understand, these fields
> could be forged, there is possible spam on a list itself.
> But I don't want to filter any spam on mailing lists -- it's
> a problem of moderators and end users.
> As I use Spamassassin Perl module together with amavisd-new,
> I'll be thankful for any workable solution as for Spamassassin,
> so for amavisd-new.
> 
> PS: With accept of the described, a week of filter's work in PASS-mode
> have shown good efficiency of the filter. Together with DNS blacklists,
> which filter in my case about 50% of incoming spam (~1000 msgs per day),
> Spamassassin covers almost unfailingly near the remaining half.
> 
> 
> -- 
> Regards,
> Andrey
> 
> 
> 
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