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Thread: ZCS 6.0.4: ClamAV detects virus in clean .exe, but only sometimes?

  1. #1
    Join Date
    Apr 2009
    Rep Power

    Default ZCS 6.0.4: ClamAV detects virus in clean .exe, but only sometimes?

    Hi there,

    I have a quite weird problem here.

    Before I start: My boss _really_ wants to send and receive exe files, and I couldn't convince him otherwise, so, as much as I would like to just let my users host their files somewhere on the internet and only mail a link, that is not possible.

    So, I made sure that amavis doesn't ban .exe extensions and mailed some of them around to make sure it works.

    So today, I got an angry mail in my inbox, saying that he wasn't able to send around .exe files. He attached the error message:

    Our content checker found
        virus: Encrypted.Zip
    in an email to you from probably faked sender:
    claiming to be: <>
    Content type: Virus
    Our internal reference code for your message is 14233-07/XxeEgH3XtiP3
    First upstream SMTP client IP address: []
    According to a 'Received:' trace, the message apparently originated at:
      [], [] []
    Return-Path: <>
    From: "xxxxxxxxxxxxxx" <>
    Message-ID: <>
    User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:
      Gecko/20091204 Thunderbird/3.0
    Subject: fsfsdfsd
    The message has been quarantined as: virus-XxeEgH3XtiP3
    Please contact your system administrator for details.
    Weird... It wasn't a zip file.

    And I am perfectly able to send around exe files using the Zimbra web client.

    Does this make any sense to you? Maybe there is something wrong with his mail client?


  2. #2
    Join Date
    Nov 2006
    Rep Power


    Would you find the entries in /var/log/zimbra.log for the SMTP transactions and post the details so we can see what Amavis was doing.

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