Can't change my sbcglobal/yahoo e-mail password on Mac OS Sierra

I am running Mac OS Sierra. Due to the Yahoo hacks, I wanted to update the yahoo/sbcglobal email password. I changed the password via the ATT website, but I can't figure out where to change it on my Mac.

If I select Mail-Preferrences, I get the following window. No place to change the password.

If I click on Server Settings, I get the following window:

Then if I click on the sbcglobal and select Edit SMTP Server List, I get the following window with no info.

The email is working however. I am really confused.