Outlook from office 2019 no longer works on comcast email servers

Correct, the issue only pertains to the full version of outlook that comes with office 2019 suite from what i can tell. it works on the free outlook provided by windows and iphone mail as well as through the xfinity website. It was working on Outlook 2019 until i had to change my password, at that point is was working intermittently. However it seemed to get worse and worse to the point it was unusable. now i am unable to readd any comcast.net email accounts as the connection to the server is dropped. verified all settings and port numbers are correct. 

I used their troubleshooting steps listed on their site was to perform a complete repair for the software which completely uninstalls and reinstalls Microsoft office 2019, including the outlook software. this was the only information i could find related to this issue. Using both Google search and Bing search i have performed all troubleshooting steps that seem even remotely related to this issue. I have seen multiple users state that this same issue occurred after they changed their password on their comcast account. unfortunately I have not seen a resolution that worked for any of them and they all the same troubleshooting steps.

@bammo​ 

Similar issues:

• Comcast email user for 10+ years.  Have been a legacy issue for 6 years having moved to a location where Comcast is not offered.
• June 5, 2024 Comcast email configured as POP stopped loading into Windows 64 bit running 10 Outlook 2021.  PERSISTENT POPUP dialog box asking for Comcast credentials and indicating that the program could not connect with the Mail.comcast.net server and that my IP address was temporarily blacklisted
• I continued to have access to my email account via the web and on my Samsung Android A525G phone.
• Over the past 15 days I have done the following, none of which appeared to have resolved the issue:
  • Changed my account password several times.  
  • Removed and reinstalled Comcast email as IMAP. 15 - 20 times using internal Outlook Account function and Mail Option in Control Panel.  Persistent "failed to connect to server messages"
  • Virus scanned my computer with 3 different programs without no findings
  • Repaired Outlook 2021 five times using the local and online web tools
  • Started Outlook 2021 in Safe Mode
  • Turned on and off two factor id on my account
  • Checked and unchecked 3rd party email client option several times in email account
  • Removed and reinstalled Xfinity App
  • Turned off NoIP (dynamic DNS service) in Netgear modem/router settings
  • Attempted to connect with two VPN programs: Norton and Personal VPN (formerly Witopia)
  • Call my ISP (Spectrum) and requested that my IP address be changed.  Declined my request. 
  • Contacted Comcast support and escalated to human tech support and security. Comcast declined responsibility and referred me to Microsoft Hotline. Not productive.
• On June 21, I took the following actions which did appear to solve the issue:
  • Repaired Outlook twice using the online tool (go to Program install/remove in Windows, select Microsoft Office, select change, select online repair)
  • Turned OFF two factor authentication on my Comcast account
  • Updated  the driver for my Intel Gigabit Network Adapter (downloaded from Intel website-Windows indicated that my driver was current when in fact it was not)
  • Connected PC to internet via Verizon wireless hotspot from Android phone.  Disabled ethernet adapter.
  • Added back Comcast email account into Outlook using pop.comcast.net. No popups requesting credentials. Flawless execution
  • Re-enabled ethernet adapter and discontinued wireless connection via hotspot to internet
• Outlook and my Comcast email account now work as before.  So far so good. 
• Unfortunately I am not sure which of these steps fixed the issue.  My intuition suggests that Comcast may have adjusted/upgraded security measure on its servers (which is good) but in doing so created incompatibility issues with legacy Outlook and other 3rd party email client users. 
• I hope someone finds this useful.

UPDATE:  JULY 25 2024

It has been over 4 weeks and my Comcast Email/Outlook 2021 configuration continues to function flawlessly. 

Hello @user_58acfs, thank you for taking the time to reach out on social media.  I understand your concern with the email, and I'd like the opportunity to check into that for you.

To access your account, will you please send us a direct message with your full name and complete service address.

To do so, click on the chat icon located at the top right of this forums page.

Here's the detailed steps to direct message us:

• Click "Sign In" if necessary
• Click the "Direct Message” icon (upper right corner of this page)
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
• Type your message in the text area near the bottom of the window
• Press Enter to send your message

@bammo​ This is happening again.  Outlook was working reliably for about 2 weeks, and the same problem has occurred.  Last time, I was told on another thread that Xfinity engineers were working on it.  Then it seemed to be fixed.  Now it's back.

(Last time, I cut the size of my file, deleted my Outlook account and reinstalled it, checked the ports, etc.  None of that worked, but Outlook just started working again one day.  And now it isn't.)

Is there a broader problem?  Is Xfinity working on it?  Why is this recurring?

Can you please confirm that you have tried using 'New Outlook', there should be a toggle where you can turn it on from inside Outlook. We have had many customers advise that once they started using the new version, they no longer had issues.

I am using Outlook 2019.

I see no toggle in Outlook 2019.