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Thread: Image Blocking workaround

  1. #1
    jholder's Avatar
    jholder is offline Former Zimbran
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    Post Image Blocking workaround

    Hello!
    SpamAssassin has been woorking great.

    However, lately, I've been getting a single SPAM message. Somehow the sender has gotton around the auto block on the images. I've included the code from the e-mail below.

    Anyway, when I open my e-mail, it's automatically displaying the image...thus confirming the existance of the spam-ee's adress.

    I was wondering if they had figured out a workaround to the image-blocking...or what.

    Code:
    <FONT face=3DArial size=3D2><A href=3D"http://prkffa.plestshoe.info/?23075838"><IMG alt=3D"" =
    hspace=3D0=20= src=3D"cid:000301c64a92$2fd0c6d0$aa0fa8c0@sanya" align=3Dbaseline=20 border=3D0>
    I report it as spam, but I just don't think spam assassin is designed to catch this type of thing.

    ideas?

  2. #2
    KevinH's Avatar
    KevinH is offline Expert Member
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    What do the spam headers look like?

    Reporting it should help train SA and in the next release we've enhanced training to train DSPAM as well. So one more bit of spam blocking is included and configured for you.
    Looking for new beta users -> Co-Founder of Acompli. Previously worked at Zimbra (and Yahoo! & VMware) since 2005.

  3. #3
    jholder's Avatar
    jholder is offline Former Zimbran
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    Howdy,
    Code:
    Received: from localhost (localhost.localdomain [127.0.0.1])
    	by tusd-exch01.tombstone.k12.az.us (Postfix) with ESMTP id ED2A3BC025
    	for <jholder@tombstone.k12.az.us>; Mon, 20 Mar 2006 22:36:33 -0700 (MST)
    Received: from tusd-exch01.tombstone.k12.az.us ([127.0.0.1])
     by localhost (tusd-exch01.tombstone.k12.az.us [127.0.0.1]) (amavisd-new, port 10024)
     with ESMTP id 03437-06 for <jholder@tombstone.k12.az.us>;
     Mon, 20 Mar 2006 22:36:30 -0700 (MST)
    Received: from friend (unknown [213.27.11.38])
    	by tusd-exch01.tombstone.k12.az.us (Postfix) with ESMTP id 9F985BC023
    	for <jholder@tombstone.k12.az.us>; Mon, 20 Mar 2006 22:36:24 -0700 (MST)
    Message-ID: <000001c64ca7$a9e14500$0100007f@kohan>
    From: "Henry" <hugh@paramed.biz>
    To: <jholder@tombstone.k12.az.us>
    Subject: Thousands of customers, meds online. 
    Date: Tue, 21 Mar 2006 08:24:02 +0100
    MIME-Version: 1.0
    Content-Type: multipart/related;
    	type="multipart/alternative";
    	boundary="------------ms000709020507030906050304"
    X-Priority: 3
    X-MSMail-Priority: Normal
    X-Mailer: Microsoft Outlook Express 6.00.2900.2180
    X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
    X-Virus-Scanned: amavisd-new at
    So you you prefer DSPAM more than Spam Assassin? I don't really have a spam problem now, but I know the more I use my e-mail, the more I will.

    BTW: I have some wicked NATting and routing goin on. I know I"m routed to localhost.

    Also, I was wondering if you guys are going to any Linux conferences or anything. Perhaps Linux Expo? They'll be in SF in Aug.

    I'd love to go to SF and see some of your latest developments.

    thx
    Last edited by jholder; 03-21-2006 at 07:19 PM.

  4. #4
    KevinH's Avatar
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    Yep this is a bug:

    http://bugzilla.zimbra.com/show_bug.cgi?id=6568

    The message was over 32k so it skips all spam checking. We plan to increase the default so a larger % or these messages get caught. The bug has the key to change if you want to increase your value locally. 100k would probably be a good default based on the message I've seen that try to get by this limit (40k, 65k, etc).

    Also, I was wondering if you guys are going to any Linux conferences or anything. Perhaps Linux Expo? They'll be in SF in Aug.

    I'd love to go to SF and see some of your latest developments.
    Yes we'll be at both the Boston and San Francisco shows. We attended both last year and plan to do the same this year. Scott is speaking at the Boston event. The SF event details are not finalized but we'll be sure to post more details once they are.
    Looking for new beta users -> Co-Founder of Acompli. Previously worked at Zimbra (and Yahoo! & VMware) since 2005.

  5. #5
    jholder's Avatar
    jholder is offline Former Zimbran
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    Hey, thanks.
    I guess it might be a good idea to start checking Bugzilla, eh?

    C ya ltr.

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