Safety Features Against Viruses and Malicious Content

Some versions of Outlook are setup to block files that may contain viruses and or malicious content. This is definitely true if you are using Outlook XP or Outlook 98/2000 with the latest security updates. Some of the more common files that are blocked end in the following extensions [listed in the table below]. A file extension is the part of the file name that comes after the dot [an example is file1.exe where file1 is the file name and .exe is the extension]. This is not a full list of the types of files, but only the most common. A full list can be provided upon request.

  • .ade
  • .adp
  • .asx
  • .bat
  • .com
  • .exe
  • .hta
  • .inf
  • .mdb
  • .msi
  • .url
  • .vb

If you see the following message when you send e-mail your e-mail client will not allow it to pass through to the recipient; the person you are sending the e-mail to will not receive the attachment. Click 'No' to the pop-up message and then right click the attachment in your e-mail and select 'Remove' from the pop-up menu. Please review the section on 'Proper Ways to Handle Potentially Unsafe Files'.


If you open an e-mail that has an attachment and see the following message "Outlook blocked access to the following potentially unsafe attachments: " in yellow the Outlook e-mail client has prevented the attachment from reaching your mailbox. Review the section onĀ 'Proper Ways to Handle Potentially Unsafe Files'.