When you think about it, it's ridiculous: almost all of those
billions of e-mails that find their way around the globe every
day are sent in the clear with no encryption of any kind applied
to the message. There are two ways to encrypt e-mail: with
S/MIME, built into Apple's Mail application—but this requires
getting (read: buying) a certificate—and GPG. GPG is a command
line utility and GPGMail is a plugin that lets Mail.app use GPG
to create and check digital signatures and to encrypt and
decrypt messages. Unfortunately, as the GPGMail team has put it,
"GPGMail is a complete hack, relying on Mail's private internal
API. Use it at your own risks!" One of these risks is that Apple
brings out OS X 10.4 or 10.5 and it takes many months or even
more than a year for an update to come out that supports the new
OS. (But complaining is easy; GPGMail is open source, so don't
complain too much. Help with coding instead.) Anyway, fairly
recently, GPGMail 1.2.0 was released. Leopard users can finally
read and write encr