Sync email Tiger's <-> Thunderbird


At home, I use Tiger, while I use Thunderbird (PC) at work. Is there some methods to sync the emails between the two. I've considered leaving all the emails in a POP server but my quota for the POP server is just ~5 MB, it is too small....
There should be an option in the preferences of each mail application to leave messages on the server for x number of days. Turn that on and you'll get each message downloaded to each machine. Granted it probably won't remember read/unread status but you'll have them.