Mac Mail Keeps Asking for Comcast Password

I have setup my Mac Mail to get emails from my Comcast account and it has been working for some time. Recently, it keeps asking for my password. After some debugging, I found out the problem came from a Mac Mail update. Here are the steps to fix the problem.

On Mac Mail, select

Mail | Preferences... | <mail account> | Advanced

Then uncheck option

[] Automatically detect and maintain account settings

Let me know if this is helpful.

Poon

4/17/2016