comcast.net email password no longer recognized by Outlook or Applemail

In the past week, Outlook and AppleMail no longer recognize my password for my comcast.net email account.  I have tried re-setting the password and re-entering it but still have the same issue.  I can log into the account from xfinity.com, so it is not a problem with the wrong password.  I have tried everything I have found in the forum or online.