I receive emails from my desktop running Windows 10. My email client is Windows 10 Mail.
I'm using AVG's filewall.
I have five email accounts, including my Comcast email account which I check every day. All of my other email accounts download a few email every day, but, Comcast does not. My Comcast email account only displays my Comcast email messages about once a week. Then, I get emails for several previous days. It is like the email is hanging up for some reason. None of my other email accounts exhibit this behaviour.
I tried to use another email client, Mozilla's Thunderbird, but, it isn't even recognizing my Comcast account's username and/or password.
I've played around with AVG's firewall. I can't seem to be able to change incoming or outgoing ports with Windows 10 Mail email client.