email stopped receiving emails

My grandmother has a email that she has had for so long time. Two weeks ago she stop receiving emails for some reason. She was able to get them on her phone but not on her computer which is easier for her to access. Can someone please help us out?

If you can give us some more information about your grandmother’s setup it would help myself and others try to figure out the problem.

Operating system?
eM Client version?
Error messages?
Pop3 or Imap?
Any notifications from sbcglobal regarding changes they were making to email accounts?

More information may be needed but this will be a good start