I have a problem with Mail.app that has been intermittent, but has become more of a permanent fixture lately. When I go to check e-mail on any of my POP accounts, I get a pop-up saying "Enter Password for Account [my email]", and it goes on to say that the POP server rejected the password and gives me a check box to remember the password in Keychain. I know the password I'm entering to be correct, and if I quit Mail and restart, it will solve the problem...for a bit. If I try to enter the password when the dialog box prompts me for it, it will just keep appearing and saying that the server has rejected the password. Any ideas?