Here is the total error messages I am getting:

The host 'SMTP.ATP.YAHOO.COM' could not be found. Please verify that you
have entered the server name correctly. Account: 'POP.ATP.YAHOO.COM', Server:
'SMTP.ATP.YAHOO.COM', Protocol: SMTP, Port: 465, Secure(SSL): Yes, Socket
Error: 11004, Error Number: 0x800CCC0D

and:

The host 'POP.ATP.YAHOO.COM' could not be found. Please verify that you have
entered the server name correctly. Account: 'POP.ATP.YAHOO.COM', Server:
'POP.ATP.YAHOO.COM', Protocol: POP3, Port: 995, Secure(SSL): Yes, Socket
Error: 11004, Error Number: 0x800CCC0D

Thanks very much. . . . . .I got the ATP.Yahoo.com stuff from AT&T.