Uses full bandwidth when fetching mail. Been using this for years but the time is right to move on. Just too poor and old. And it's starting to be a pain. Also  what's the point in spam folder when you can't mark things as spam? Could be a little more simple when setting up (like auto poll not working until background sync is set to always) but once sorted it's a good mail client (other than the above issues). But it's never going to evolve. Bye  was good to begin with.
December 14 2016