10 core i9 iMac- Catalina, comcast email won't accept my correct password.

After reading the prior questions and responses on this subject there still has been no clear or even suggested fix. So after following all of the various suggestions, ie. restart, log out, delete accounts, etc. there doesn't seem to be any clear means to create an email account for comcast mail, and yes I verified that my password works by logging in to my email using safari. No problems with my email account in high sierra BTW. Please help.