Webmail application for mod_python

[Wolfgang Draxinger]

I'm looking for a Squirrelmail* like webmail application, that I
can hook up into mod_python. Is there anything ready to use or
do I have to hack it myself?

I don't like Squirrelmail, since I don't like PHP, and
Squirrelmail depends on it.

In the danger of getting my ears biten off in this NG: webmail
apps for mod_perl or mod_ruby would be acceptable, too.

Wolfgang Draxinger