When you set up Frontier Webmail on a new service, you may be asked for this information.
Incoming Mail Server (POP3): frontier.pop.mail.yahoo.com
Incoming Mail Server Port: 995
Outgoing Mail Server (SMTP): frontier.smtp.mail.yahoo.com
Outgoing Mail Server Port: 465
Username: Your entire Frontier email address
Password: Your email password
SSL: Yes, or check box
Requires authentication: Yes, or check box