ATT email issues with a Macbook Pro
I've been having issues trying to add an att.net and a sbcglobal.net email addresses to my Macbook. I get errors like Oops, something went wrong. That error happens when I try to add he address using the Yahoo icon on the Mail program. When I try to add it doing the Other email account by adding it manually I guess you could say. The error message i get on that is can't verify email address or password. I know I'm putting in the correct password because I can get my mail on Yahoo's website without any issues.
Any help would be helpful.
I've been talking to tech support many times and I can't get any resolutions. I'm wondering if it's on ATT's end on why it's not being added to the Mail program on the Mac when I can add a gmail and a yahoo address to the mail program.
Thanks in advance