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user_05x30j
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14 Messages

Wednesday, December 10th, 2025 6:26 PM

Outlook 365 Email not connecting to Comcast Email servers

Hello, My Outlook 365 Email stopped connecting to the Comcast Email servers on Monday at 4:25 PM

Please help?

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4 hours ago

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XfinityRaul

Official Employee

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2.4K Messages

9 days ago

@user_05x30j We want to thank you for reaching out on the Community Forum for support with your account. We are glad we were able to resolve your email issue and get you into a better monthly rate. Never hesitate to create another public post for any of your future account and service needs!

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Accepted Solution

Again

Expert

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33.1K Messages

8 days ago

@user_05x30j Just an FYI....

Direct messaging isn't allowed until an official employee asks you to do so; it's against the Forum Guidelines and the Acceptable Use Policy to send anyone an unrequested DM/PM.  Also note, if you do send one without being asked to do so, it could possibly be ignored.
  
 Please post your issue in public in the proper forum so that it can be addressed either by other customers or by an Official Employee. 

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user_05x30j

14 Messages

8 days ago

Outlook 365 Email is again not connecting to Comcast Email Servers.

Yesterday I worked with Comcast Team members in trouble shooting this connection issue.  I was receiving this error message:


Task 'Synchronizing subscribed folders for [Edited: "Personal Information"] reported error (0x800CCC0E) : 'Outlook cannot synchronize subscribed folders for [Edited: "Personal Information"]. Error: Cannot connect to the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

All of my imap settings are as Comcast recommends.  Then, Comcast Team members suggested to reset my password.  Once I reset my Comcast Email password my mail began to update.  My email worked properly until 6:58 PM last night.  My Spouses Outlook 365 email also stopped updating at about the same time last night.

This morning My and My Spouses Outlook 365 email is still not updating.

What could be the issue?

Please help...

(edited)

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XfinityChristy

Official Employee

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2.6K Messages

@user_05x30j  We are so sorry to hear that your Outlook 365 connection to your Comcast email has dropped again, especially after all the troubleshooting you did yesterday! It is very frustrating when an immediate fix doesn't last.

Since both your and your spouse's email stopped working around the same time, this strongly suggests an issue with the password/security token refresh in Outlook.

Here is what likely fixed it yesterday and should fix it now:

  1. Reset your Comcast Password again. Even if it seems redundant, doing this often forces a full security sync.

  2. IMMEDIATELY enter the newly reset password into both your and your spouse's Outlook 365 settings, ensuring the password field is completely up-to-date.

This often resolves intermittent connection errors like 0x800CCC0E. Please let us know if the issue returns!

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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8 days ago

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Cammby

Contributor

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61 Messages

8 days ago

Changing passwords does NOT fix the issue.  Tried doing so for multiple accounts and every single one still has the synch problem.  It's unbelievable that such an important part of this service isn't being pushed to the forefront for a fix.

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user_05x30j

14 Messages

8 days ago

Hello, I have changed my Comcast email password and my Outlook 365 email will still not connect to the Comcast Servers.  I then changed my Comcast email password to a totally different password.  My Outlook 365 will still not connect to the Comcast Servers.  And now my Iphone mail will not connect to the Comcast Servers...On my Iphone I am getting the following message:  Server code:  "Alert",server message "Temporarily blacklisted IP Address - Try again latter.

Please Help...

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XfinityPaula

Official Employee

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1.8K Messages

@user_05x30j I'm sorry to see we are back in a similar place as yesterday. On the iphone have you been able to update the password in the mail settings on that device? 

For outlook, did you need to make any other changes to the settings for the incoming or outgoing servers? 

  • Incoming Mail Server Name: imap.comcast.net
    • Incoming Mail Server Port Number: 993 with SSL ON
  • If the Mail Client lets you select an authentication method, choose STARTTLS.
    • If Needed: 143 with SSL ON
  • Outgoing Mail Server Name: smtp.comcast.net
  • Outgoing Mail Server Port Number: 587 (SMTP)
    • If Needed: 465 (SMTPS)
  • Encryption: TLS (use SSL if TLS isn't shown.)
  • Authentication: Type in your Comcast.net email address
I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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8 days ago

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user_05x30j

14 Messages

8 days ago

Hello Paula,

I was able to update my Comcast email password on my iPhone and now I am receiving my Comcast Emails on my iPhone.

I made the suggested changes above, but my Outlook 365 Email will not communicate with the Comcast Servers.

What changed Monday evening, on the Comcast email servers, that caused both my and my spouses Outlook 365 email to loose the ability to communicate with them?

Please Help...

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XfinityRaul

Official Employee

 • 

2.4K Messages

@user_05x30j This is a known issue and it's something our engineers have been working on. The only workaround we have at this time is to sign in to your email using our website.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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8 days ago

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user_05x30j

14 Messages

8 days ago

Hello Raul,

When do You expect a fix to be implemented?

How will Us users be made aware of the fix and how to proceed?

I look forward to Your responses...

Thank You...

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XfinityRaul

Official Employee

 • 

2.4K Messages

@user_05x30j These are great questions! We don't have an ETA at the moment and we'll be emailing or sending some sort of notification to all of our customers.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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8 days ago

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user_05x30j

14 Messages

2 days ago

Outlook 365 Email not connecting to Comcast Email servers

Hello, My Outlook 365 Email stopped connecting to the Comcast Email servers on today at 3:47 PM

Please help?

I am receiving the following errors:

Outlook 365 Email not connecting to Comcast Email servers

Hello, My Outlook 365 Email stopped connecting to the Comcast Email servers on Monday at 4:25 PM.

I am receiving the following errors:


Task 'Synchronizing subscribed folders for [Edited: "Personal Information"].' reported error (0x800CCC0E) : 'Outlook cannot synchronize subscribed folders for [Edited: "Personal Information"]. Error: Cannot connect to the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

Please help?

(edited)

1

Badger76

Regular Visitor

 • 

6 Messages

Having same issue with O365 Outlook.  iPad syncing but iPhone, Mac Book, and Android phone not syncing.  Appears to be similar to last week's issue.

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2 days ago

0

user_05x30j

14 Messages

2 days ago

Hello Xfinity, I have followed all of Your instructions, why have My Outlook 365 Email stopped connecting to the Comcast Email servers?

This is happening to other users...

Please let us know,

Thank You...

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user_05x30j

14 Messages

1 day ago

Hello Xfinity, 

My Outlook 365 Email stopped connecting to the Comcast Email servers on Yesterday at 3:47 PM.

Still today the Outlook 365 Email will not connect to the Comcast Email servers.

What has happened?

Please help...

Thank You...

1

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Badger76

Regular Visitor

 • 

6 Messages

I did get some O365 emails this morning, but as of about 30 minutes ago it's not syncing again.

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24 hours ago

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user_05x30j

14 Messages

4 hours ago

Hello Xfinity, Your Email Servers began communicating with my Outlook 365 Email at 7 PM.  Thank You...What was done to correct this issue?

I look forward to Your response...

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