bellsouth.net, sbcglobal.net, att.net and yahoo based email domain address set-up for a iPhone

As many of you have experienced within the last several months, att.net, sbcglobal.net, bellsouth.net, and other yahoo based email domain address has not been working correctly on the iPhone. The information that I have discovered is that Yahoo is having issues configuring their mobile server to work with the iPhone. After speaking to tech reps at Apple, AT&T, and Yahoo, the best way to resolve this issue is to download the Yahoo Mail App. Downloading the app will allow user to connecting to their email accounts. First, you log into your email at yahoo.com on your computer. Next, you download the Yahoo Mail App, and log onto the App. That's it. Your good. I hope this helps.