Why has my email stopped syncing with my Pixel 2 phone?

My OnePlus 10 Pro 5G (android) phone stopped loading my comcast emails yesterday. I just discovered they still load just fine on my very old Blackberry PRIV. So, comcast is not playing nice with gmail and they need to get that fixed immediately.

I am now having this issue .. started 9/17.  My Comcast email is working on my notebook but on my Pixel 6A it stopped working.  My GMAIL account works on my Pixel.  I am running the latest version of Gmail .. updated on 9/6.  I removed my Comcast account on the phone and tried to set it back up again but now it says it can't create the account.  I know all of the settings are correct because I verified them against the settings on my notebook.  I have had this Comcast account for 25 years and I really need it to work on my phone.  Did something else recently occur in mid September?

As has been noted, this is more of a GMail issue. I just tested with Android Outlook (basic free, not the Office 365 version), and it works.

Also, I checked my Samsung tablet and my Comcast email account stopped synching on 9/16.  If I go to the Gmail app on the tablet and "pull down" to refresh, the circle just spins for a bit and then stops.  No emails are loaded.  So this is clearly NOT a setting that I accidentally changed.  It's a problem with Gmail using "OTHER" types of email accounts (not Gmail, Exchange, 365, etc).  I am apparently on the latest versions of Gmail on both devices so hopefully there's an update coming out soon.  

Update:  This doesn't make any sense to me but I noticed that some of the apps on my phone and tablet were acting sluggish.  I also occasionally got a message on my devices saying "your wifi doesn't have access to the internet".  So tonight I unplugged my Comcast router for a bit and plugged it back in.  First thing I noticed was that everything was running faster.  For absolutely no reason I decided to try to enter my Comcast email address into Gmail on my Pixel.  It allowed me to enter it and it's working now.  Then I went to my tablet and reloaded my emails there smoothly.  So the issue with Comcast email going to my phone was partly because of my wifi?  Seems REALLY strange but that's the story.  

There can be times where your modem is not quite registered with the Comcast servers. Most sites will be fine, but Comcast may not work. A reboot refreshes the registration. It sometimes happens after local maintenance causes some changes that get everything confused.

It suggests that I could have gone off wifi (and use Verizon for service) and I would have been able to reenter my Comcast email account into GMail.  There was no real reason for me to reset the router but I was doing some process of elimination.  I have been in IT for 35+ years but I would have never thought my Comcast router would interfere with getting Comcast emails on my phone.  Sincerely.  I'm glad it's working and I will reset the router if I see it happen again but I'm still scratching my head a bit.  

The Same thing is happening on my Samsung Galaxy S22 and my Wife's S20 using the default Mail app. It seems that If I remove and add the account back it works for maybe an 1 hour and then it stops. The last Email I got before this happened was at Nov 7th at 1am, so it seems that IT push a breaking change (Im using IMAP). The Mail app was updated back in July so its not the app.  Seems Xfinity IT is always breaking things and not testing any of there changes! 

I have uninstalled the Mail app Reinstalled, Cleared the app Cache. I check the remember my device on the credential screen. None of it seems to fix the issue. After an hour it seems to be stuck. I'm trying to see if there are logs for the app to see if its showing the issue.

Also I'm going to try outlook mobile and see what happens.

My Samsung phone has 3 emails setup, the Gmail, and 2 different Comcast email accounts.

Gmail and 1 of the Comcast accounts is syncing with no issues. The other Comcast account suddenly stopped syncing on Nov 7th at 2:38 AM.

What is the issue? Phone does not appear to be an issue OR my Gmail OR one of the comcast accounts??

Someone please assist to resolve!!

Same issue.  Regular Samsung e-mail.  Delete and reinstall and it works for a short time and then stops syncing.  Desktop and laptop comcast e-mail through a browser works fine.  Samsung S20

All of this sounds similar to what happened with GMail awhile ago. I'm guessing Samsung's email app is just a rebadged version of the Google email core that GMail also uses, and they pushed out an update from that buggy release. Google eventually updated the GMail app to fix it. Samsung probably needs to do the same.

I have no problems using Outlook.

Galaxy s10e suddenly doing the same thing. Can log into Xfinity webmail but won't sync to my android. Tried everything above; fixes for 1 day or less. Each app says it's up to date in the play stores. Gmail works. Comcast doesn't, bottom line. 

Comcast email, no Gmail, Android phone.  Email is not syncing fir the last several days.  I've been asked to rrlog into my account several tines and have done so.

WTF is going on?

Same here, stopped yesterday morning, restarted once i removed and readded account, only lasted about an hour though