Here are the settings to use with COX.net email:
IMAP Settings (recommended)
Incoming Server
Account Type: IMAP
Incoming Server: imap.cox.net
Port: 993
User Name: [username]@cox.net
Connection Security: SSL/TLS
Authentication: Password
Outgoing Server
Server Name: smtp.cox.net
Port: 465
User Name: [username]@cox.net
Connection Security: SSL/TLS
Authentication: Password
POP Settings
Incoming Server
Account Type: POP
Incoming Server: pop.cox.net
Port: 995
User Name: [your username]
Connection Security: SSL/TLS
Authentication: Password
Outgoing Server
Server Name: smtp.cox.net
Port: 465
User Name: [your username]
Connection Security: SSL/TLS
Authentication: Password