Visitor

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1 Message

Tuesday, November 18th, 2025 12:56 AM

IMAP issues with Comcast since Nov 9th

On Nov 9th, all of my devices quit syncing with Comcast.  I use WIndows Outlook 2024 pro and my iphone and Ipad.  The error I get on my PC is "we couldn't connect to the incoming (IMAP) server.  None of the authentication methods supported by Outlook are supported by your server"  I also received a security warning "The server you are connected to is using a security certificate that cannot be verified.  The target principal name is incorrect."    I then tried my Iphone and Ipad and received the error " Invalid username and/or password.  Please check your SMTP user name and password.

Actions taken

- Review and made sure the Incoming and outgoing mail servers were correct (Example imap.comcast.net (port 993,SSL enabled)

- I changed my password on comcast to see if that helped the process.  It did not.

- I tried on a different network, no luck

- I totally deactivated Norton Firewall when signing in...no luck

- Cleared the outlook cache.  No luch

- removed and tried to re-establish the account.  No change

I am at wits end and it has been extremely frustrating.  Any ideas to help

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Visitor

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2 Messages

3 days ago

Same situation with the same timing - Sunday 11/9 I lost all syncing abilities and have tried multiple methods to resync. This is not a User issue.

Official Employee

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3.5K Messages

3 days ago

Hi, @user_8w49mk! Thanks for reaching out about getting your emails to come through. We appreciate how detailed you were in your message and for the steps you took troubleshooting. I have run into this with a few other customers. I checked our engineering issues and do not see this listed so have been troubleshooting and opening tickets to get our Advanced team involved. I know you changed your password but need to clarify, are you able to log in to the Xfinity email website without issue and see new emails that have come through? 

Visitor

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2 Messages

2 days ago

Last night I deleted the account to try that approach once again and guess what - I can't recreate the account as the "Comcast server is currently unavailable." I went and created a Gmail account and have my Comcast emails being forwarded to it, so I have access to emails on my phone. As much as I hate the pain of change, I will likely make a full transfer to Gmail, which is probably what Comcast wants in the first place.

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