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Blocked IP address

I'm a Comcast customer as is the friend I'm trying to send an email. I'm going thru my company server.  The email has bounced with this message:


This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
    host []
    SMTP error from remote mail server after initial connection:
    554 Comcast block for spam. Please see


My email address is not on any blacklists.  When I asked Comcast to remove their block, they sent this email:


Thank you for contacting Comcast Customer Security Assurance. We have received and reviewed your Block List removal request.

Blocklist Removal Response: After investigating the issue, we have found that the IP you provided for removal is currently not on our blocklist.

IP Address Submitted:


And yet, the block continues and I got the same message when I tried to email again.


I re-submitted another removal request (since there is no way to dialog with the noreply@ response), but all they did was send me the same message.


I'd like to get this resolved and am hoping someone here can help me do that.


Thank you.


Re: Blocked IP address

You can try calling them direct------------------


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

Normal business hours (6:00 am to 2:00 am EST, 7 days a week)

1 - 888-565-4329