Visitor
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2 Messages
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!
Latoque
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
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leftbrainjason
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.
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CCLysa
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?
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CCLysa
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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