Visitor

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3 Messages

Friday, July 25th, 2025

resomta-c2p-555920.sys.comcast.net resomta-c2p-555920.sys.comcast.net ESMT

I have been using Outlook to manage my Comcast email account for about 15 years. Starting yesterday I could receive email but not send. I also use Thunderbird for my Quickbooks account and can't send emails there too. If I log in to xfinity through a browser I can send without problems. I tried creating a new account tab in Outlook but it won't pass the test phase when sending.

Any Ideas?

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Expert

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112.3K Messages

12 days ago

The concern is not "Home Security Devices Rules And Automations" help related........... Topic moved here to the proper help section for assistance. 

Visitor

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3 Messages

Thanks, email was not on any of the menu choices

Official Employee

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1.7K Messages

Hey @user_2bhsly , Thank you for visiting our official Xfinity Forums Community support page. We greatly appreciate you taking the time to share your experience regarding your email. I would be more than happy to offer my assistance looking into this further for you. When you log in online to your Xfinity email through the browser, do you have the 3rd party email checked off under settings? You can check out more details here Turn your access to third-party email programs on or off in Xfinity Email.

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.
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Visitor

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3 Messages

I tried that. No change. The latest is I was on phone with a second tier Tech person and he told me to delete all third party accounts. Wait 24 hours then reinstall. I waited 36 hours and it worked for 2 days. Today I received "Sending of message failed. An Error occurred sending Outgoing server (STMP)error. The server responded resomta-c2p-555661.sys.comcast.net resomta-c2p-555661.sys.comcast.net Comcast block for spam.

Any Ideas?

Official Employee

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213 Messages

Thank you for trying that on your end, user_2bhsly! Hmm, that is interesting. We will need to research this issue further as it is recognizing your emails as spam, resulting in this error message. Please send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account. I'd be more than happy to look into this for you.
To send a Direct Message, please click on the “Direct Message” icon in the top-right corner of the screen, next to the bell icon click the "New message" (pencil and paper) icon then type or select "Xfinity Support". Type your message in the text area near the bottom of the window and press Enter to send your message and initiate a live session. 

 

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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