I don't know if you want to go there, but you might want to look at [link|http://webservices.xml.com/pub/a/ws/2003/05/13/email.html|this] article by Jon Udell, and [link|http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/266625|this] Python script (which puts the mail in a database...).

The other solution is to remail the stuff, but that's a last-resort, of course.

HTH a bit. Good luck.

Cheers,
Scott.
(Who uses Thunderbird :-)