Topics Map > University of Chicago > IT Services > Email & Collaboration Tools
Outlook 2010 - Restricted or Blocked Attachment Types
This article explains what types of attachments get blocked in Outlook 2010, and recommendations on how to send emails that include those blocked file types.
To help protect your computer, Microsoft Outlook 2010 does not allow you to receive files of certain types (such as .exe files) as attachments, because of their potential for introducing a virus into your computer. Outlook blocks these files by default. For a complete list, please see Attachment File Types Blocked In Outlook.
Sending Blocked File Types
If your attachment is blocked because of file type, you have several options. We recommend the first of the choices listed below:
- Don't email the file at all! Transfer the file through WebShare. Documentation and help regarding WebShare can be found here.
- Rename the file so that the file type is not one on the blocked list. For example, rename myfile.exe to myfile.exx. Be sure to tell the recipient of the email to change the file name back.
- Compress the file using a file compression program like WinZip or WinRAR. This option has the added advantage of making your email smaller, thus taking up less space in the recipient's Inbox and your Sent Items, as well as conserving overall email system resources. Be sure your recipient knows how to uncompress the file once they receive it.