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user_1nb1zr
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Thursday, July 10th, 2025 2:59 PM

resimta-a2p-650769.sys.comcast.net gave this error Prohibited by policy

I have an email group of around 70 addresses.  When some people reply to all they get delivery failure and the error above for all the comcast.net addresses in the group.  Most recipients are able to reply to all with no issue.  This has been happening for a couple months.  If the person getting the error sends to just my email address it goes through without issue.  How can I get this resolved?  Thanks

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5 hours ago

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XfinityOrlandoM

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2.2K Messages

6 hours ago

@user_1nb1zr

Thanks for reaching out to us we do apologize for any inconvenience. This link https://www.xfinity.com/support/articles/email-errors  has great information on how you can troubleshoot the comcast email errors and messages as an "Xfinity email delivery failure notification" indicates that an email sent from your Xfinity Connect account was not successfully delivered to the recipient. These notifications, often called "bounce messages," are typically generated by the recipient's email server and inform you of the reason for the failed delivery. 

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user_1nb1zr

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Thanks, I have no problem sending to the entire list of addresses from my comcast.net account..  The errors are being received by one of the people in the To field when replying to all  to one of my emails.   He gets the error for all addresses in the distribution list for comcast.com.  Is there a character limit in the To field that is causing comcast's gateways to reject the incoming email?  It's less than the documented 100 address limit.  Again, it is happening when a recipient of my original email reply's to all.  If he just reply's to me, I get the email without issue.  Thanks

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5 hours ago

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XfinityOrlandoM

Official Employee

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2.2K Messages

@user_1nb1zr

Unfortunately there wouldn't be much we could troubleshoot since the error is coming to those people replying to you. Those customers would need to check the settings in their e-mail and their server to make sure there's no settings preventing them to respond to emails.  They may need to remove any attachments that are on the email to be able to reply

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5 hours ago

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