Is there an e-mail client for a Mac G4 operating under 10.2.6 that can encrypt e mail. I have a client that wants to use a digital certificate from Verisign. Is there a way short of using a Windows box?
I don't know of a solution that uses Verisign, but for $80 you can get PGP Desktop for OS X. Haven't used it myself, but it claims to interface with Mail.app and Entourage X.
PGP is supposed to be quite good - it gives the FBI fits.
THe free, open source version of PGP is called GnuPG. Works the same if not better than PGP (less flab). There is a plugin for Mail.app that works great with GnuPG (aka gpg).
Install GnuPGP via pkgs from GnuPG site or via Fink. Can use old PGP keyrings too.