How to set up your e-mail account on an Apple iPhone from AT&T
From your iPhone's home screen tap "Settings"
From "Settings" tap "Mail, Contacts, Calendars".
From within the "Mail, Contacts, Calendars" section, tap "Add Account".
From within the "Add Account" section, tap "Other".
Tap "Add Mail Account"
Enter your Email account information:
Once you have entered your information, tap "Save".
Enter the Mail Server information:
Use the following for both the Incoming and Outgoing Mail Server
If you receive the following error, be sure you have the correct server settings.
"Secure Connection Failed The certificate may not be valid."
The ssl certificate is only valid for mail.hosting-advantage.com
If you are using something other than mail.hosting-advantage.com
for your server Host Names you will need to change this.
As an alternative, once the account is setup,
go into the account settings and disable the use of SSL.