Name: Your Name (Whatever you want)
Email: xxxx@t-online.de
Password: Your t-online.de account password
Description: T-Mobile Online Germany
Click Next Button
Hostname: secureimap.t-online.de
Username: xxxx@t-online.de
Password: Your t-online.de account password
Hostname: securesmtp.t-online.de
Username: xxxx@t-online.de
Password: Your t-online.de account password
Click Save Button
Use SSL: Yes
Authentication: Password
Server Port: 993
Use SSL: Yes
Authentication: Password
Server Port: 465