If your Bellsouth email account is not working in the Outlook, then you need to do following this that are given below:
If the problem is with the password, then you can try changing it.
Moreover, if you have forgotten the password, then you can reset it.
Make sure the antivirus software installed on your system is not causing any issue.
You even can try to check whether you have configured your account correct or not.
Try repairing your Outlook profile sometime it may be the cause.
Even after executing all these steps, if the problem persists, then you can try connecting with the experts of Bellsouth customer service to solve your issue promptly.