Yes - it's not simple to make sure you've done the right thing to make email clients backup correctly. I used to be a regular Thunderbird user on Windows becau

Yes - it's not simple to make sure you've done the right thing to make email clients backup correctly. I used to be a regular Thunderbird user on Windows because the mail file format would be open, but haven't touched desktop email since GMail. If I were to make a choice now, I'd look at those with conversation support i.e. Postbox or Thunderbird for Windows, Sparrow or Lion's Mail.app for Mac.