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Thread: Attachments sent from Thunderbird appended to message on delivery

  1. #1
    lcxe is offline Active Member
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    Default Attachments sent from Thunderbird appended to message on delivery

    We recently discovered an issue with Zimbra when receiving attachments that were sent using Thunderbird, specifically text and picture files. All other attachments appear to work fine.

    The problem is that when a message is sent from Thunderbird with either of the two file types as attachments, their are appended to the end of the message in Zimbra and are no longer attachments. Thunderbird does something similar where the contents of the files are appended to the end of the message, but they are still kept as attachments.

    When sending from Zimbra, all attachments remain as attachments and aren't appended to the end of the email, and Thunderbird reads the email exactly the same as when the message is sent from it.

    So I was wondering if anyone else has experienced this behaviour? If so were you able to find a solution? I couldn't turn anything up with searches unfortunately, though I thought that this would have been a problem that someone ran in to by now.

    While it's not the most severe of issues, it comes to be a big hassle when you're attaching files of code and such.

    Any help would be greatly appreciated.

  2. #2
    kirme3 is offline Trained Alumni
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    I noticed the same thing with my 5.0.7 install. Going to 5.0.8 didn't correct it, which I figured wouldn't. I haven't had any chance to troubleshoot it though.

  3. #3
    dkarp is offline Zimbra Employee
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    When you look at the "Show Original" of the Thunderbird-originated message, does the attachment say "Content-Disposition: inline"? If it does, then Thunderbird is explicitly telling the receiving MUA that the file is meant to be displayed as part of the message, not as an attachment.

    If you can post a "Show Original" of the Thunderbird-originated message, I can give you a slightly more informed opinion...
    Bugzilla - Wiki - Downloads - Before posting... Search!

  4. #4
    lcxe is offline Active Member
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    The "Content-Disposition: inline" line doesn't appear to be present anywhere.

    My test attachments for this case were all text files, named test1-4 all with their contents corresponding to their file name. Here's the contents for Show Original:

    Return-Path: user@server.com
    Received: from 192.168.254.XX (LHLO server.server.com) (192.168.254.XX) by
    server.server.com with LMTP; Tue, 5 Aug 2008 08:29:31 -0400 (EDT)
    Received: from localhost (localhost [127.0.0.1])
    by server.server.com (server) with ESMTP id 94D445478003
    for <user@server.com>; Tue, 5 Aug 2008 08:29:31 -0400 (EDT)
    X-Virus-Scanned: amavisd-new at
    X-Spam-Flag: NO
    X-Spam-Score: -3.919
    X-Spam-Level:
    X-Spam-Status: No, score=-3.919 tagged_above=-10 required=6.6
    tests=[ALL_TRUSTED=-1.8, AWL=0.480, BAYES_00=-2.599]
    Received: from server.server.com ([127.0.0.1])
    by localhost (server.server.com [127.0.0.1]) (amavisd-new, port 10024)
    with ESMTP id XWxYxt-M7-FI for <server@server.com>;
    Tue, 5 Aug 2008 08:29:31 -0400 (EDT)
    Received: from server.server.com (server.server.com [127.0.1.1])
    by server.server.com (Postfix) with ESMTP id 0E3DC5478001
    for <user@server.com>; Tue, 5 Aug 2008 08:29:31 -0400 (EDT)
    Date: Tue, 5 Aug 2008 08:29:30 -0400 (EDT)
    From: user <user@server.com>
    To: user <user@server.com>
    Message-ID: <437615.30501217939370907.JavaMail.root@server>
    In-Reply-To: <4898454D.9020008@server.com>
    Subject: Fwd: test
    MIME-Version: 1.0
    Content-Type: text/plain; charset=utf-8
    Content-Transfer-Encoding: 7bit
    X-Originating-IP: [192.168.254.XX]


    ----- Forwarded Message -----
    From: "user" <user@server.com>
    To: "user" <user@server.com>
    Sent: Tuesday, August 5, 2008 8:19:25 AM GMT -05:00 US/Canada Eastern
    Subject: test

    test message

    test1
    test2
    test3
    test4

  5. #5
    dkarp is offline Zimbra Employee
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    Please post the message from Thunderbird, not the one from Zimbra.
    Bugzilla - Wiki - Downloads - Before posting... Search!

  6. #6
    lcxe is offline Active Member
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    Ah, I misinterperetted your post. I thought you meant to check it in Zimbra, because that's the only place where the "Show Original" option is present.

    After checking the message source in Thunderbird you were right, the "Content-Disposition: inline" line is present. Did a quick Google search. Found that the solution was to edit the user's prefs.js file and add the line 'user_pref("mail.content_disposition_type", 1);'.

    Thanks a bunch for the help.

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