.P7M File

The p7m file extension is associated with Secure/Multipurpose Internet Mail Extensions, also known simple as S/MIME. S/MIME provides a consistent way to send and receive secure MIME data.

Based on the popular Internet MIME standard, S/MIME provides the following cryptographic security services for electronic messaging applications: authentication, message integrity and non-repudiation of origin (using digital signatures) and privacy and data security (using encryption).

Not all email programs are able to handle S/MIME signatures, and if they are unable to do so, an attachment called smime.p7s that may confuse some people.

MIME types:
application/pkcs7-mime
application/x-pkcs7-mime

Files with p7m file extension is related to Secure/Multipurpose Internet Mail Extensions format which is used for digital signature.

How to open:

Signatures are usually imported to operating system or programs to verify the digital credentials of the user.

How to convert:

This particular file type is not meant to be converted to anything else.