Files with p7m file extensionis related to Secure/Multipurpose Internet Mail Extensions format which is used for digital signature.
P7mViewer 4.5 displays the contents of smime.p7m files and other files encrypted or signed in the S/MIME standard. It gives easy access to encrypted or signed email messages in web-based mail clients, encrypted e-mail attachments, signed documents and secure file archives. Winmail.dat Viewer - Letter Opener. Rated 4 out of 5 stars. P7mViewer 3.0 displays content of smime.p7m files and other files encrypted or signed in S/MIME standard. It gives an easy access to encrypted or signed email messages in web-based mail clients, encrypted e-mail attachments, signed documents and secure files archives. Free P7M to PDF converter from CoolUtils. Convert P7M to PDF online without any fee or registration, get your PDF file in seconds. P7mViewer 3.0 is a standalone application designed to view files and e-mail messages encrypted and/or signed in compliance with S/MIME standard.
There is one other file type using
the P7M file extension!
.p7m - SecureSoft encrypted data
Software that open p7m file
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P7M file extension- S/MIME digital signature
What is p7m file? How to open p7m files?
File type specification:
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
Updated: May 21, 2021
The default software associated to open p7m file:
Company or developer:
OpenLimit SignCubes AG
OpenLimit CC Sign is utility used to generate certified or advanced electronic signatures.
Help 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.
Related links:
List of software applications associated to the .p7m file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open p7m file, edit p7m file, convert p7m file, view p7m file, play p7m file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting p7m files.
Software that open p7m file - S/MIME digital signature
Programs supporting the exension p7m on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about OpenLimit CC Sign for open p7m file action.
Microsoft Windows:
P7m Viewer Mac
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Well, you could switch to Mail.app - as it has no problems with signed messages.
At least, I have not have had any problems with it the last 1-2 years...
Maybe PGP signing is a problem?
Mail.app even signs / encrypts the message for you if you have a certificate in your keychain... :-)
---
/Marook
E-mail is many things, but, unfortunately, 'safe' is not one of them.
There is an old saw that you should never send something in e-mail that you
would mind seeing on the front page of the New York Times, and that's as
true today as it was when e-mail first became popular in the 90's. E-mail
(and, in fact, all Internet traffic) travels through many servers between
your computer and its final destination, all belonging to strangers. And
while it's true that the sheer volume of e-mail that travels the 'net these
days is probably enough to keep yours safe even if someone does care enough
to snoop, I still wouldn't send a credit card number or the PIN for my ATM
card through e-mail.
This is a long-standing problem that has yet to be fully addressed by
standards, but there is a solution, albeit one that requires you and your
e-mail partner to take some steps. You can get a free digital certificate
that will allow you to digitally 'sign' your e-mails and allow others to
send you encrypted e-mail. You can also send encrypted e-mail to anyone who
sends their certificate to you.
This all sounds more complicated than it is. Basically, the steps are to
sign up for a certificate, install that certificate (handled automatically
for you by the Mac), then start using it. If someone sends you their
certificate in e-mail, you simply have to tell your e-mail program to save
it (again, handled automatically if you use Mail, and requiring one step if
you use Entourage).
You can get a free certificate from a company called Thawte
(http://www.thawte.com) and can find the complete instructions (and what is
probably a better explanation than the one I just provided) here:
<'>http://tinyurl.com/yxz7rj>;
The direct page for the free e-mail certificate is here:
<'>http://tinyurl.com/9atq7>;
This hint is nonsense. All mainstream e-mail applications will work with s/mime messages. As a previous commenter noted, Mail.app works perfectly. Also, Thunderbird works, and Entourage works, and eudora works.
I suspect that the author of this hint was using Hotmail or something. This is not a Mac hint! Hotmail doesn't read s/mime messages on windows either! Use a real e-mail client!
JP
---
Pell
P7m Viewer Free
I have found that if you save a S/MIME e-mail message from Entourage you can open it in Mozilla to decrypt it. I have a mail rule for emails that contain smime attachments. The rule triggers an AppleScript to save the message and then open it in Mozilla. It is not the most elegant solution, but it works for the few signed e-mails I receive every month.
Well, it also works that way if you are using Claris eMailer...
Sorry, but please move over Eudora. Even Microsoft Applications can handle S/MIME nowadays. I would still suggest to keep away from Microsoftware. Instead user the wonderful Mail.app or Thunderbird!
Pepi
From http://emperor.tidbits.com/webx/TidBITS/Talk/54
There is no working S/MIME plugin available for current Eudora on MacOS X. Entrust's docs are pretty clear that they support up through Eudora 5.0.2 and MacOS 9. Sadly, Qualcomm's SDK for plugins also seems to be rather outdated for the Mac and seems to demand CodeWarrior. That reduces the audience for writing such a plugin, since the free dev tools for Mac OS X are perfectly suitable for that sort of work.
Eudora for Mac was neglected by Qualcomm from 2004 onwards, before they let it go completely. Perhaps it's time for the OP to update his mail client?
ft.
There is an Entrust plug-in for Eudora. We use it at work.
AFAIK the Entrust plugin is not available for private person, only companies can buy it.