Penn Computing
Computing Menu Computing A-Z
Computing Home Information Systems & Computing Penn
Email Services - Frequently Asked Questions:

General Information

Search the FAQ:

Related links:

Why can't I send a Microsoft Office document as an attachment to an Exchange account?

If you are getting a bounced email with an error like

#554 5.6.0 STOREDRV.Deliver; Corrupt message content ##rfc822;
it's possible Thunderbird is sending the attachment with the incorrect MIME encoding. To fix the problem:
  1. Close Thunderbird.
  2. Navigate to the following directory based upon your operating system:
    • Windows 2000/XP: C:\%userprofile%\Application Data\Thunderbird\Profiles
    • Windows Vista: C:\%userprofile%\AppData\Roaming\Thunderbird\Profiles
    • Mac OS X: /Users/<username>/Library/Thunderbird/Profile
  3. Open the directory named with a random set of characters like "yo6luyl8.default". There may be multiple directories if you have multiple Thunderbird profiles.
  4. Delete the file named 'mimeTypes.rdf'.


Information Systems and Computing
University of Pennsylvania
Comments & Questions

University of Pennsylvania Penn Computing University of Pennsylvania Information Systems & Computing (ISC)
Information Systems and Computing, University of Pennsylvania