Description of Problem:

Other Email clients that have PGP/GnuPG plugins (Mozilla -
http://enigmail.mozdev.org, Outlook etc) often don't encrypt their messages
in a way that Evolution understands.  So all you get in the Evo mail window
is stuff like this:

-----BEGIN PGP MESSAGE-----
Version: GnuPG v1.2.1 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

hQEOA1gbQHwly8YDEAQArBd9LuH/zouF5/qRX8fntAOTjcVTFi4Ewe9ApCZ3ekXO
LKzrGmSOhvpG0bhuU9pwT7luNi8/GZSdbdWaaqZyZWdkRglR3slAuhM8YlRs41e3
....
-----END PGP MESSAGE-----

Now this wouldn't be a problem if you could manually tell Evo to decrypt
the message.  But you can't.  So you have to do it by hand with GPG.  Annoying.

Of course the best thing would be for Evolution to detect the message as a
PGP/GPG encoded mail to being with but perhaps that is harder than it sounds.

If you want I can attach some sample GPG encrypted messages that Evo fails
to detect as encrypted if you want.  Let me know.

Regards