Unable to connect to POP3 server this morning

Is Comcast POP3 server down this morning?  It worked fine yesterday afternoon at 5:55 pm EDT. 

My Thunderbird email client using POP3 is reporting it "Could not connect to server mail.comcast.net. Connection refused".  I have been able to log in using the www.comcast.net site successfully and read and send email, but I have been using Thunderbird for many years, and POP3 email from comcast for several decades.

Also does not work on my spouse's computer this morning (same setup, different email account).

A ping to the server fails. [I note a ping to the IMAP server also fails, so perhaps this is a standard setting on the servers to avoid responding at all to DOS attacks.]

SMTP server appears to be working, so I can send using Thunderbird.

IMAP server appears to be working, as gmail client on my phone (IMAP) receives email from comcast.net (and from googlemail of course).

The outage reporter at www.comcast.net indicates no outages. 

Anyone else have this problem?  What's going on Comcast? @XfinityThomasB   ?

My setup: 

Windows 11 Home version 10.0.26100 Build 26100 version 24H2, with latest updates. last update (KB5063878) (26100.4946)

Thunderbird 140.2.0esr (64-bit)

POP3 (incoming email)

Server: mail.comcast.net   [also tried pop3.comcast.net which has same error]

Port: 995

User name is my email address [xxxx.yyy]@comcast.net

Security: SSL/TLS

Authentication: Normal password

Check on new messages at startup

SMTP Settings (outgoing email)

Server name:  smtp.comcast.net

Port: 465

User name is my email address [xxxx.yyy]@comcast.net

Authentication: Normal password

Security: SSL/TLS

What's going on Comcast?