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How to open .P7S file extension?

File Type : PKCS #7 Signature
Compatible with (WinXP,Vista,Win7,Win8 and Win10)

Looking for a program to open .P7S files?

"Windows unable to open a file!" is probably the most common error faced by millions every day. This is either because the program required to open a file is not available on your system or there may be other issues.

We recommend that you run a free scan to check for missing drivers.



What is .P7S file extension?

.P7S file extension is a known file type. This section of tells you everything you need to know about this extension.
Email message that includes a digital signature; can be used for sending secure emails that can only be viewed by the intended recipient; verifies that the email is from who it claims to be from and that the email has not been modified in transit. If an email program does not handle digital signatures, a P7S file may appear as an attachment (smime.p7s) to the email message. NOTE: Email programs that use P7S files use PKCS (Public-Key Cryptography Standard) #7 to sign email messages.
You can see a list of software programs here on that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.

Software that can be used to open .P7S files:

Microsoft Windows:
  • Microsoft Outlook 2013
  • Mozilla Thunderbird
  • PostBox
  • Mozilla Thunderbird
Apple Mac OS X:
  • Apple Mail
  • Mozilla Thunderbird
  • PostBox