The File Extensions Database

.BAD File Extension

  • Developer by: Microsoft
  • Category: Text Files

What is an .BAD file?

.BAD is Exchange Badmail File

E-mail message that could not be delivered by Microsoft Exchange Server; includes the message sender, message recipient(s), subject, and body, just like the original message.

BAD files are stored in the Badmail folder along with .BDR and .BDP files. They can be viewed by transferring them to the Pickup folder.

Programs that open Exchange Badmail File
Microsoft Exchange Server

How to solve problems with BAD files

  • Associate the BAD file extension with the correct application. On :
    Windows: Right click on any BAD file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.BAD files". Mac: Right click (or Ctrl-click) the BAD file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .BAD is Exchange Badmail File. Because only the current version supports the latest BAD file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .BAD is Exchange Badmail File update.
  • To make sure that your BAD file is not corrupted or virus-infected, get the file again and scan it with antivirus software.