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Sending ZIP Files, Bypassing Exchange Server's SPAM Filter
If you wish to attach a ZIP file to your email, you must first change the ZIP extension to a TXT extension (i.e. change "filename.zip" to "filename.txt"). You may then attach the file to your email and send it, making sure to instruct the recipient to change the file extension back to ZIP.
There has been a large increase in SPAM and phishing attempts that contain attachments with the ZIP file extension. Therefore, all future emails that contain attachments with the ZIP file extension (i.e. "filename.zip") will be filtered out by the Exchange server.
Windows 7, by default, will hide the extensions for known file types. To reveal all file extensions, click on your start button and type "Folder Options" in the search field. Click on the first result.
Click on the "View Tab" within the new "Folder Options" window. Uncheck the box labeled "Hide extensions for known file types". Click "OK".
Now right-click on the file of your choice and select "Rename" from the context menu. Hilight the last portion of the filename (i.e. ".zip") and type in the new extension (i.e. ".txt"). Make sure that a period "." exists between the filename and the extension (i.e. fileame.txt)!
Your file is now ready to be shared over email. Please instruct the recipient to change the file extension back to ZIP.