How to configure automatic PGP/GPG encryption?

[Peter Simons]

Hi guys,

I use Gnus to read and write e-mail. Now, I would like to configure a list of
e-mail addresses, and then I'd like Gnus to automatically encrypt every message
that I send to one of those addresses. I used to do that with bbdb-pgp.el, but
unfortunately that code is based on mailcrypt, which -- unlike Gnus/PGG --
doesn't seem to know anything about modern MIME formats.

Is there a simple way to accomplish that?

Take care,
Peter