There was a problem logging onto your mail server. Your password was rejected.'pophost.123-reg.co.uk.', Server: 'pophost.123-reg.co.uk.', Protocol: POP3, Server Response: '-ERR invalid user or password', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC92
Check your email client settings, making sure that the POP3 and SMTP servers are correct, and that your full username and password are correct.
If you are still having problems, your password may have become corrupted. Try changing it.