I use mozilla for my mail. I figured, time to switch to Thunderbird (and my colleagues are raving about it). I installed it but I uninstalled it soon after. The reason is it doesn't auto-import from mozilla: Note: This method brings over your mail and account settings, your junk mail training data, and filters. Make sure your POP account in Thunderbird is configured to leave all mail on the server in case you want to go back and read pop mail from Mozilla Mail. Also, copying the Mozilla profile results in a lot of preferences and files no longer needed, since Thunderbird is a mail client only. Remove redundant files at your own risk. I guess I won't be switching right now, given that mozilla mail is already excellent. No, I am not going to write a script to do this. Yes, I am a lazy ingrate. But, if you use Outlook or Eudora, you're covered; import will just happen for you. Go for it....