What does this mean? Task 'pop.mail.yahoo.com - Receiving' reported error (0x800CCC92) : 'Your e-mail serv?

Task 'pop.mail.yahoo.com - Receiving' reported error (0x800CCC92) : 'Your e-mail server rejected your login. Verify your user name and password in your account properties. Under Tools, click E-mail accounts. The server responded: -ERR [SYS/TEMP] Server not ready. Please try again after sometime'... show more Task 'pop.mail.yahoo.com - Receiving' reported error (0x800CCC92) : 'Your e-mail server rejected your login. Verify your user name and password in your account properties. Under Tools, click E-mail accounts. The server responded: -ERR [SYS/TEMP] Server not ready. Please try again after sometime' What does this mean?