Comcast blocking email Again

[#1]

I have had a number of returned messages from comcast today.  Could this be looked into please?
The following message to <xxxxx955@comcast.net> was undeliverable.
The reason for the problem:
5.4.7 - Delivery expired (message too old) 554-'imta36.westchester.pa.mail.comcast.net comcast 212.159.7.100 Comcast block for spam.  Please see http://help.comcast.net/content/faq/BL000000 '

Reporting-MTA: dns; pcl-ipout02.plus.net
Final-Recipient: rfc822;xxxxx@comcast.net
Action: failed
Status: 5.0.0 (permanent failure)
Diagnostic-Code: smtp; 5.4.7 - Delivery expired (message too old) 554-'imta36.westchester.pa.mail.comcast.net comcast 212.159.7.100 Comcast block for spam.  Please see http://help.comcast.net/content/faq/BL000000 ' (delivery attempts: 0)

[#2]

Hi Artmo,
Sorry to see you've had an issue with this again. Could you please provide me with the full headers and the body of the message from the bounce back and I'll raise this with our Net Ops team.
Adam

[#3]

Thanks Adam.  Sent info in a PM.

[#4]

Thanks, message received.
I've raised ticket 46107931 for you to the appropriate team.

[#5]

That's good, thanks Adam for your quick response.

[#6]

No problem

[#7]

Comcast now back to normal again.  Thank you for sorting it   I'll close the ticket.