Apple Email Box Doesn't Bring in Email Anymore
I've had my MacBook Pro for almost 5 years now, and have used the generic Apple email box that was on the computer when I got it. This year I have noticed that I get this message saying 'Can't Connect To The Account 'Bellsouth'" Then underneath the message it says 'Enter the password for user 'Bellsouth.net' On the left of the message is the @ sign (in blue). I have no idea what my password is for this, but I have tried all kinds of passwords and nothing works. I have tried my email account password, but it doesn't work. Any ideas on what happened to my email box and how I can fix it? Thanks.
MacBook Pro 15″, macOS 10.14