

Help/Troubleshooting Information, about:profiles to create and launch multiple profiles.

Later, you can always transfer data such as Local Folders, address books etc. Once you have two accounts working properly, add the rest in the same way. It doesn’t boast some of the more advanced options you’ll find in third-party apps, but it works well. (Select the account in the left pane of Account Settings, set the smtp in Outgoing Server (SMTP) in the right pane). Mail is the built-in email app on every iPhone and iPad. Have each account send through an smtp server which has the same User Name and password (mail key) as the incoming account.

Give each account a distinct Account Name, and each smtp a distinct Description. Confirm that the account can send and receive, then add another account once the first one is working. I think the settings for all your accounts are becoming increasingly complex, with all the conflicting advice, that I'd suggest you create a new profile, and add one account with the AT&T recommended settings, and use a secure mail key in place of the regular account password.
