How to fix BellSouth email login issues?
In some cases it is possible that bellsouth.net email login problems can be a server-side issue. If that is the case, then there is not much you can do till Bellsouth resolves the problem on their own. If you are having issues with BellSouth and Outlook, then you can contact Bellsouth and they will let you know. Though a simple way to fix this error is to log out of your BellSouth account and then re-login.
For more details: How to set up and fix Bellsouth email not working issue