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Thread: Banned file type catching PPTX as wmf

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  1. #1
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    Default Banned file type catching PPTX as wmf

    Not sure why this is happening. What is the relationship here?

    Banned name: .wmf,docProps/thumbnail.wmf
    Content type: Banned
    Internal reference code for the message is 26135-14-5/Qep0YTJfyTmt

    From the banned email
    Content-Type: application/vnd.openxmlformats-officedocument.presentationml.presentation;
    name="Physicians Group IC.pptx"
    Content-Transfer-Encoding: base64
    Content-Disposition: inline;
    filename="Physicians Group IC.pptx"

  2. #2
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    Default WORD .docx

    The same behavior can be found in some word documents, it would appear that MS-Office 2007 formats under some conditions embed media formats in the compressed files with the .???x extension
    Last edited by jrefl5; 03-22-2010 at 10:31 AM. Reason: correct spelling

  3. #3
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    Default

    Possibly there is a wmf file embedded in the PowerPoint file?

    wmf files are not generally used much anymore, due their big security issue a few years back (See Windows Metafile vulnerability - Wikipedia, the free encyclopedia for more info), and many scanners today simply block wmf files as a matter of course.

    We block wmf files in our hosting farm, and perhaps 2-3 users complain each year. Of those complaints, generally only one of the attachments is a legitimate (but older) business-related attachment. The other attachments most would consider as "not safe for office viewing" by any stretch.

    In your case we would advise the sender to remove the wmf file from the PowerPoint file and resend.

    Hope that helps,
    Mark

  4. #4
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    Default

    Looks like Microsoft thought it would be a good idea to include a Thumbnail image of the document. I see talk in clam lists asking for a work around (Have not found one yet)

    So Office 2007 is adding
    docProps/thumbnail.wmf

  5. #5
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    Default

    Can thumbnails be turned off in Office? (We use OpenOffice mostly...)

    We also recommend clients convert Office documents to PDFs when sending for read-only use.

    Hope that helps,
    Mark

  6. #6
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    Default

    Same thing happened to me, couple of days ago, so I saved the file as PPT, not PPTX

    Quote Originally Posted by LMStone View Post
    Can thumbnails be turned off in Office? (We use OpenOffice mostly...)

    We also recommend clients convert Office documents to PDFs when sending for read-only use.

    Hope that helps,
    Mark
    It's a Power Point Presentation, no point of converting it to PDF.

  7. #7
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    Default

    Only work around I've been able to implement was to set the default save formats to Office 97, i.e. without the x on the extension name.

    Just looked around in the 2007 save as options and I did not see any thumbnail options.

  8. #8
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    Just stop blocking wmf extensions for now...
    It does appear to be the thumbnail. what a pain~!

  9. #9
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    Default

    I have the same issue, you can turn of the thumbnail on an individual documents, but there is no global configuration setting in office 2007 that disables this "feature", except changing the default format to excel 97.

    I have reluctantly turned of .wmf scanning for the time being.

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