Emails aren't sent or received - emails moved to outbox - open emails to see what's wrong

Same Issue for 2 days now!  I did download Outlook and can get my emails there just fine and all of the time without any glitches.  The interesting thing is I have 2 other Comcast emails accounts through my main one and they both still work in the Samsung App.  I have never had to resign in on those.   The server settings are also different from my main Comcast account.  The 2 others both have a place for me to enter my password.  My main account does not.  It is always the one that when I have had to sign in (or after removing the account and adding again), the App takes me to the Xfinity login where I have the 2 step verification activated.  I thought maybe it had to do with that 2 Step process that is causing the issue, since I don't have that on my 2 emails that are working with the Samsung App.  I tried deactivating the 2 step and re-adding my main account to the App, but it still takes me to the Xfinity login and the emails syncing issue still exists.  Samsung or Comcast - PLEASE WORK TOGETHER AND FIX!!

Same problem here.  Am having to sign in directly to Xfinity through the internet on my phone to retrieve my messages.

One email acct will not stay synced, I remove and reinstall and it works for maybe an hour then stops again...just started two days ago

I'm having this same issue.

Ditto. Exactly. Mine's a Galaxy S9+. 

Still having issues. My last sync was yesterday after I uninstalled it and then reinstalled. this is crazy.

Mine is working now.  I was prompted to sign in again. Seems to be ok now 

Same issues for me on Samsung S23. uninstalled and reinstalled, removed account and added back, restarted phone...No luck. Syncs once and fails after that.

The problem will not away until Samsung and Xfinity work together to resolve the issue. 

The only solution right now is to uninstall Samsung Email App.  When you log back in it works

Only problem is it only works for about 30 minutes and then it fails...

I talked to an agent yesterday.  To be blunt they have no clue on what is going on. 

I would suggest everyone contact your local TV station or Consumer Affairs in your area and ask them to help.

When I talked to the Agent she tried to sell me Xfinity Mobile, when I clearly stated I did not want that and would appreciate you focusing on the problem....

I have had the same issue. I think I found the solution. Maybe it's a new security feature, maybe not. I have no idea. Sign in to your email through the xfinity website on a computer and go to the settings tab on the top right. Then go down to "Security". There is an option for "Third Party Access Security". Maybe due to an update or whatever, mine was unchecked. Checking that box to allow access seems to have resolved the issue. 

Since 2:05 am Tuesday, my Comcast emails aren't being sent or received on my android Galaxy S20FE 5G. I tried to send a test message to my own email address. It gets moved to my outbox with the message: "Couldn't send." I select the email that didn't send and it says: "Couldn't authenticate...the password or authentication method may be incorrect. Check your outgoing server settings, then try again." I then selected: "Settings" and it brings up the "Server settings" screen. I don't know what the fields should be, but haven't changed anything to my phone or settings or done a phone update. I did a soft and hard restart (pushed the down volume and power button together until restarted), but still not working. I can send and receive emails if I go directly to Comcast's email site. Help.  Was on phone with Comcast and was told to uninstall and reinstall app to see if that fixes it, (it did) but after 30 minutes or so, it fails again. This just started on November 7, 2023. Xfinity needs to work with the Samsung Email app and get this fixed pronto! (Desk top PC and tablets are all working. Can receive and send emails.)

I was having the same issue, so went and downloaded Email Safe & Secure and no more issues, at least for now.  It definitely seems like a Samsung and Xfinity issue, since it is Samsung Email I was using.

Glad to see I'm not the only person.  What is odd is my wife has exactly the same phone as me (Galaxy S10) and her comcast email is working fine.  

My solution for now is I installed Edison Mail and my email works perfectly fine.

Nothing changed on my phone (no updates) so I suspect this is a comcast issue.

Same here. I went to the website and verified that I have the correct setting but after pressing done I get the message "Couldn't verify account". 

It seems like it is an issue with Xfinity. I tried using Gmail and another app on Samsung S21FE. Gmail couldn't log in and my other email app would work for about 30 minutes and then it would stop syncing again.