Task 'firstname.lastname@example.org - Receiving' reported error (0x800CCC90) : 'Your incoming (POP3) e-mail server has reported an internal error. If you continue to receive this message, contact your server administrator or Internet service provider (ISP). The server responded: .'
I use the following other programs that may or may not be interfering with the email.
PCTools Registry Mechanic
Norton Internet Security
PCTools Spyware Doctor