Username: Your full email address
Password: This is the password you chose when you set up your email account in cPanel
Incoming Mail Server (POP/POP3): mail.yourdomain.com (where yourdomain.com is the actual domain name)
Outgoing Mail Server (SMTP): Usually you will use mail.yourdomain.com (where yourdomain.com is the actual domain name). Your ISP may require you to use their email server to send email, and you would use theirs instead.