Casio E-125 Mail Setup Tool V.1.2 - Manual (Page 5)

Mail Setup Tool (Version 1.2US) User's Guide -Page 5 -
5. Tap Next to advance to the Dial-up Connection ID screen.
● User Name
Type in your user name.
● Domain
Normally, you should leave this field blank. Input your ISP's domain name only
when specifically instructed to do so by your ISP.
6. Tap Next to advance to the Telephone Number screen.
● Country Code, Area Code, Phone number
Input the phone number of the access point of your ISP you plan to be dial in to.