web based mail front end with pgp/gpg support?

[Amos Shapira]

Hello,

We are pushing the company to use PGP/GPG for secure e-mail and while
we Linux people have no problem using Thunderbird+Enigmail the windows
and mac users find it a bit difficult to get it working on their
laptops/desktops.

We use a hosted Exchange server in the company and this is a given.
Can't change that.

Someone from customer engineering mentioned that one of our customers
provide a web-based PGP-enabled mail interface which allows him to
send and receive pgp email through a browser, but he doesn't know
which product it is and I'll bet is commercial anyway.

Is anyone aware of something like this based on Open-Source?  I found
a few plug-ins for Firefox to do GPG/PGP on parts of web page which
are claimed to work well with GMail, but I suspect that's not quite
it.

I also saw some reference to SquirrelMail PGP plugin
(http://squirrelmail.org/plugin_view.php?id=153).
RoundCube, which as far as I remember, looks much better, doesn't have
PGP support (http://trac.roundcube.net/ticket/1440396).

Any ideas?

Thanks,

--Amos