Importing a pfx or p12 file into Gmail

If you access Gmail via POP3 or IMAP, you are using an email client (like Outlook) and should use the guide for your email client. If you access Gmail via the Gmail web interface, you will need a special add-in for reading and sending S/MIME messages because Gmail does not natively support S/MIME.

Penango is a web browser add-on that allows people to send and receive S/MIME encrypted messages via the Gmail web interface.