need netscape/mozilla mailer for MacOS 9.x

My wife's Powerbook runs Mac OS 9.2. She's fed up with Eudora, so I 
figure it's time to install Thunderbird or Netscape for mail, since 
that's what I like. OK, so OS 9.x is too old for Mozilla to write a 
version of Thunderbird for it. The latest version of the Netscape 
software is 7.0. It's rife with bugs! The browser does nothing but 
freeze up. I have to force quit many times.

Is there an update or a tip?

I'm willing to try another mailer. It has to speak both POP and IMAP.

Thanks.

My email is easy to figure out by doing the obvious thing.

Tom Reingold
Noo Joizy