The File Extensions Database

.P7M File Extension

  • Category: Misc Files
  • Format: Binary

What is an .P7M file?

.P7M is Digitally Encrypted Message

A P7M file is an encrypted email message that contains the contents and attachments of a sensitive email. It is used to prevent unauthorized users from accessing information in an email and may require a private key that matches the message's public key in order to open the document. P7M files are typically used for protecting confidential medical, financial, and business information.

P7M files are typically seen as smime.p7m files. These files include the contents and attachments of an email and have been secured with Secure/Multipurpose Internet Mail Extensions (S/MIME), which is a public key encryption standard of MIME data.

Most P7M files, including smime.p7m files, can be opened using Cryptigo p7mViewer.

Programs that open Digitally Encrypted Message
Cryptigo p7mViewer
Apple Keychain Access

How to solve problems with P7M files

  • Associate the P7M file extension with the correct application. On :
    Windows: Right click on any P7M file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.P7M files". Mac: Right click (or Ctrl-click) the P7M 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 .P7M is Digitally Encrypted Message. Because only the current version supports the latest P7M file format. Search, therefore, e.g. on the N/A manufacturer website after an available .P7M is Digitally Encrypted Message update.
  • To make sure that your P7M file is not corrupted or virus-infected, get the file again and scan it with antivirus software.