P7M File

What are P7M files and how to open them

Are you having problems opening a P7M file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your P7M files.

What is a P7M file?

Files that contain the .p7m file extension hold encrypted email messages. The P7M file format is a container format and the contents and the attachments of the encrypted email message are enveloped into the encrypted P7M file.

Oftentimes a user must have a private key installed into their email client in order to open the P7M files that they receive. The private key will match the message's public key so that the user can open the P7M file. This private key is static and does not change so that a user does not have to enter new information to open each P7M file they receive.

The P7M file format implements the Secure/Multipurpose Internet Mail Extension standard (S/MIME).

How to open P7M files

Important: Different programs may use files with the P7M file extension for different purposes, so unless you are sure which format your P7M file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different P7M openers which you will find listed below.

Last updated: February 20, 2024

Various apps that use files with this extension

These apps are known to open certain types of P7M files. Remember, different programs may use P7M files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about P7M file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.