P7M File Type- The quick facts
What are P7M files and how to open them
Are you having problems opening a P7M file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your 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 10 different P7M openers which you will find listed below.
Last updated: March 15, 2022
Suggest another file format using extension P7M
While we know of one file format using the .P7M file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .P7M file.
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.