This article details the email clients supported with Symantec Encryption Desktop 10.3.2 (previously PGP Desktop) for Mac OS X.
When secure email messaging is enabled, Encryption Desktop monitors the email traffic between your email client and your mail server. Depending on the circumstances, Encryption Desktop will intercede on your behalf to encrypt, sign, decrypt, or verify messages.
Compatible Email Client Software
Symantec Encryption Desktop 10.3.1 for Mac OS X will, in most cases, work without problems with any Internet-standards-based email client that runs on Mac OS X 10.8.4, Mac OS X 10.8.5, Mac OS X 10.9, or Mac OS X 10.9.1.