Visitor

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1 Message

Monday, November 17th, 2025 1:54 AM

Can receive emails but not send emails

I can receive emails with my comcast.net email but cannot send emails. All info is correct, I have compared to my family to ensure everything is accurate. My password is certainly correct as I have reset it just for this issue. The error message is “Cannot send mail” “The connection to the outgoing server smtp.concast.net failed. Additional…”

Please help me to solve this issue as I am very sure all my information is accurate and after deleting from my iPhone, restarting my router, changing my password, searching through forums, and logging into the Xfinity site to ensure my info is correct, I am still unable to get everything to work.

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Gold Problem Solver

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26.9K Messages

2 days ago

... outgoing server smtp.concast.net failed ...

Is "smtp.concast.net" a typo? It should be "smtp.comcast.net".

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

Official Employee

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2.1K Messages

22 hours ago

Good evening user_4gjar3 thank you so much for reaching out here via our Xfinity Forums! What third party program are you using to access your Xfinity emails? For IMAP, the following settings are required for access, along with Enabling Third-Party Email Access via Xfinity Email Settings. 

 

For other programs not listed, use these settings to connect your Comcast.net email:
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

 

Derived from Set up your Xfinity Email address with an email program

 

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