Python email

[LutherRevisited]

I'm attempting to write an email client, and I've run into a snag.  I've seen
several docs on email, but they're not dumbed down enough for me.  Basically
I'm downloading my messages like this:
M = poplib.POP3('pop.mail.yahoo.com')
        M.user('username')
        M.pass_('password')
        inMail = str(M.retr(i))
and I get the message just fine, but I want to pull out of all that just the
html part.  How can I do this.