Sounds like an Embarq problem, but good luck getting them to look at it.
If you've got his address blocked from Embarq, I'd wait until he gets a
delivery failure at home, then turn the block off and tell him not to do that
again.
From: Paul Everett
+1
From: Campbell, Rob [mailto:rob_campb...@centraltechnology.net]
Sent: Tuesday, March 17, 2009 2:58 PM
To: MS-Exchange Admin Issues
Subject: RE: emails flooding from Embarq
Sounds like an Embarq problem, but good luck getting them to look
I've seen a similar issue where the sending server believes the recipient
did not get the entire message, so it sends again. Embarq may be willing to
help out to keep this from continueing, or wait till the TTL expires and
they'll NDR the message back to his home mailbox.
What's your maximum