I use up-to-date Debian stable linux. I receive email using Thunderbird. I use POP3. The settings are port 995, SSL on.
In November, Comcast had problems with email: neither mail.comcast.net nor pop3.comcast.net were working. Your forum writers suggested using 126.96.36.199 which worked until Dec 19, 2018. Now none of the three addresses work. I can access my email using the Internet.