After long talks with both Comcast and Microsoft, I cannot solve this problem.
Running Windows 10 and Outlook 2013 on desktop and laptop. Yesterday and the day before, got Windows updates and now I cannot connect to email. (No Outlook update.) I can get it by going to the Comcast website. If I log off the router on my laptop and log on to an Xfinity hot spot, it works fine. Reset the router, but no help.
At the same time, I have lost visibility to my home network on either the desktop or laptop. Router is fine for connecting from my iPhone or iPads.
Both Comcast and MSFT point at each other. Comcast rep made some comment about Outlook not doing the proper updates to support Comcast. I can't find anything about that through google. MSFT rep made numerous attempts to fix it, but not much I hadn't already tried.
If you haven't already, try deleting the account from Outlook, then recreate it from scratch. Also, as a test, download Mozilla Thunderbird and see if the same thing happens------------
Yeah, I already tried deleting the account and setting it up again (imap account).
Re Thunderbird, I tried that and have a similar problem. Tried to set it up with my Comcast email/password and it said it failed to find the settings for my email account. Which I know are correct.
The bizarre thing to me is that I can connect Outlook to Comcast through an xfinity hot spot near me, but not through my router.