I finally got incoming AND outgoing email to work. To the instructions below from tylermacman
you have to add TURN OFF PRIMARY OUTGOING SMTP SERVER AND TURN ON AT&T SMTP Server.
SO- SETTINGS>Mail,Contacts>Acct>scroll down to SMTP click>Turn Off Primary>Scroll down to Other SMTP Servers AT&T>Click on AT&T>Turn On.
I don't own an iPhone, so I had to borrow one from a co-worker. Please follow these steps:
1. From your iPhone desktop, go to Settings > Mail, Contacts, Calendars
2. Select your Suddenlink email account and remove it by scrolling down and tapping the Delete Account button.
3. Tap Add Account and select Other.
4. Enter the appropriate answer for each box, as follows:
Name - Your name
Address - Your Suddenlink email address
Password - Your Suddenlink Password
Description - This is the nickname for the account (for example,
Home)
5. Tap Save to continue.
6. On the next screen, tap POP.
7. Scroll down to Incoming Mail Server and enter the following:
Host name - pop.suddenlink.net
User name - your Suddenlink email address
Password - your Suddenlink Password (if not auto-entered)
8. Scroll down to Outgoing Mail Server and enter the following:
Host name - smtp.suddenlink.net
Username - your Suddenlink email address
Password - your Suddenlink Password (if not auto-entered)
9. Tap Save to continue.
10. Tap Yes for Cannot connect using SSL.
11. Tap OK to dismiss the POP account verification failed warning.
12. Tap Save, then Save again to continue.
13. Tap the account you just created.
14. Scroll down and tap Advanced.
15. Scroll down and tap Use SSL to turn it to the OFF position. Note that the Server Port field changes from 995 to 110. The authentication method should already be set to Password.
16. Tap Home, then Mail, then Settings, then return to the iPhone's Home screen and you should be able to send and receive email on your iPhone using Suddenlink's POP/SMTP, Password-authenticated connection.