Name: Your Name (Whatever you want)
Email: Your username
Password: Your yeah.net account password
Description: yeah.net
Click Next Button
Hostname: appleimap.yeah.net
Username: Your username
Password: Your yeah.net account password
Hostname: applesmtp.yeah.net
Username: Your username
Password: Your yeah.net account password
Click Save Button
Use SSL: Yes
Authentication: Password
Server Port: 993
Use SSL: Yes
Authentication: Password
Server Port: 465