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Visitor

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3 Messages

Sunday, February 20th, 2022 4:05 PM

Closed

Authentication required message

After I updated my Mac OS ... I can get receive emails in my Mac Mail but I can not send/reply.
It keeps telling me:

The sender address( my email here) was rejected by the server smtp.comcast.net.

The server response was: Authentication required

Select a different outgoing mail server from the list below or click Try Later to leave the message in your Outbox until it can be sent.


I have NO idea what that means or how to fix it.
Can someone help me with this?

Problem Solver

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1.1K Messages

3 years ago

Good morning! I am sorry to hear you are running into issues after an update. I want to check some basics first to ensure this is not the issue. Can you check if the third-party client access function is enabled. Please review steps in the link below to resolve your issue.

 

https://comca.st/3sWyE1l

Visitor

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3 Messages

@XfinityKorie​ 

Yes. The boxt for Third party was (is) checked.

Problem Solver

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1.1K Messages

Can you visit https://comca.st/3p0Iqya, and ensure your other settings match. 

I no longer work for Comcast.

Visitor

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3 Messages

Hey Korie ...
I just deleted and then added my xfinity email account to my Mac Mail and it fixed it.
I have NO idea why ... but it all works now. 
Thank you for your help.  ;D

Problem Solver

 • 

1.1K Messages

Of course! Glad re-adding it worked. :) We are here for you, so if you ever need anything else, please reach out. Have a good weekend! 

I no longer work for Comcast.

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