I've been using K-9 Mail for my Cox account. It works fine, except for one thing. I never seem to get rid of emails I've deleted. Oh, they're gone from the server, but when I go to delete from the trash, it may pop up again.
I use Select All, but it only take care of a bit. And when it won't load any more and I go back later, they're still there. Some are months old.
Is there a setting to prevent that?