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Posted to users@spamassassin.apache.org by Igor Ybema <ig...@virtu.nl> on 2006/10/24 14:38:46 UTC

hotmail false positive on new 'live mail' service

Dear users,

I recently discovered soms false positives from hotmail users. This
seems to originate from users which already are converted to there new
'live' website (instead of the old hotmail look).

What I see in the headers is that they changed there HELO:

Received: from BAY115-W3 ([65.54.250.103]) by
bay0-omc3-s38.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830);
	 Tue, 17 Oct 2006 06:13:03 -0700

There is no 'hotmail.com' anymore in the HELO message. This way it gets
the tag 'FORGED_HOTMAIL_RCVD'. Did more people already discover this?
And is there already a solution?

Regards,

Igor Ybema, Network Operations
--------------------------------------------
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Auke Vleerstraat 1
7521 PE  Enschede
Tel:  +3153-4340570
Fax: +3153-4363098
E-mail: noc@virtu.nl
Internet: http://www.virtu.nl/
--------------------------------------------


Re: hotmail false positive on new 'live mail' service

Posted by Alex Bramley <al...@netservicesplc.com>.
Igor Ybema wrote:
> Dear users,
> 
> I recently discovered soms false positives from hotmail users. This
> seems to originate from users which already are converted to there new
> 'live' website (instead of the old hotmail look).
> 
> What I see in the headers is that they changed there HELO:
> 
> Received: from BAY115-W3 ([65.54.250.103]) by
> bay0-omc3-s38.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830);
> 	 Tue, 17 Oct 2006 06:13:03 -0700
> 
> There is no 'hotmail.com' anymore in the HELO message. This way it gets
> the tag 'FORGED_HOTMAIL_RCVD'. Did more people already discover this?
> And is there already a solution?

I've noticed this problem a couple of times too. It looks like the tests 
in the _check_for_forged_hotmail_received_headers subroutine in 
Mail::SpamAssassin::EvalTests need to be updated to recognise this as valid.

Here are a couple more examples:

Received: from BAY101-W6 ([64.4.56.106]) by 
bay0-omc3-s31.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830);
	 Tue, 24 Oct 2006 07:39:10 -0700

Received: from BAY101-W9 ([64.4.56.109]) by 
bay0-omc3-s7.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830);
	 Wed, 25 Oct 2006 06:11:34 -0700

Cheers,
Alex