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Visitor

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2 Messages

Sunday, January 1st, 2023 9:56 PM

Closed

Blocked incoming email

I have a business associate who has trouble sending email to me.  The email is blocked on the first attempt, but very often succeeds on the second attempt if sent only to me.  The domain of the source email is elderhaus.org.  The error message received by the sender is:  "Your message was rejected by the recipient email server. Please check the recipient's email address and try resending your message, or contact the recipient directly. For more tips to help resolve this issue, see DSN code 5.1.0 in Exchange Online - Office 365<https://go.microsoft.com/fwlink/?LinkId=389362>. If the problem continues, contact your email admin."  In addition, he receives "Remote Server returned '554 5.1.0 40.107.236.100 Comcast block for spam. Please see https://postmaster.comcast.net/smtp-error-codes.php#BL000000'".  I have checked for any blockages that I control, but have found nothing.  Is there a higher level spam control filter that rejects specific email addresses?  And if so, can this email address be removed from this filter?  It seems to happen when my email is one of multiple addresses in the "To" list.  It does not seem to happen if I'm the only one in the "To" list or if I'm in the "CC" list.  

Thank you!

Expert

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29.6K Messages

2 years ago

Call Comcast security. They handle any blocking issues--------------

Comcast Customer Security Assurance---------

Normal business hours (6:00 am to 2:00 am EST, 7 days a week) 1 - 888-565-4329

Visitor

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1 Message

They're not much help at Comcast

Visitor

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1 Message

2 years ago

I have a client having similar issues, following in hopes of finding a resolution. He's also sending from an O365 Exchange Server and being blocked for spam by Comcast sending to groups of people, but messages addressed to the comcast recipient alone seem to go through. I'll stop back to let you know if I'm able to resolve the issue on my own.

New Problem Solver

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617 Messages

2 years ago

Hi @user_2feb42

 

I hope you have been well! I see our Expert gave some awesome advise. Have you been able to make contact with our CSA team? 

 

Visitor

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2 Messages

@XfinityLysa​ 

I called the line and the information was taken to assist in the investigation.  I was given a ticket number and the issue was escalated.  I am awaiting a call back from the security team.   If I have not heard back by tomorrow, I will call again for a status update.  

Expert

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31.3K Messages

@user_2feb42​ 

Did the sender check the link that was given to them on the block?  This is what that code says:

BL000000

Our filters have determined that email from your email server has been sent in patterns which are characteristic of spam. In an effort to protect subscribers, your email server has been blocked from sending email to the Comcast network. Mail servers are typically shared by many users so it may be the case that another party using your email server has sent spam, even if you have not.

How do I get my IP removed from the blocklist?
It is important that your email administrator is aware of their outbound spam problem to avoid being blocked by Comcast in the future. When contacting your email administrator, you should include the error message contained in the email which alerted you to this problem. This error message contains important information to help your email administrator resolve this issue. Removal requests can be submitted at postmaster.comcast.net/block-removal-request.html and will require the IP address of the blocked email server. Requests submitted through this form are monitored 24 hours a day, seven days a week to ensure a timely response.

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

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New Problem Solver

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617 Messages

2 years ago

@user_2feb42

 

I appreciate you sharing this update with me! If you need anything further from us, please let us know! 

 

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