Mr. Hildreth, please fix your broken mail system

[Joe Kelsey]

Scott Hildreth has a completely broken mail system.  Every time I
respond to one of his messages, I get the following from his system. 
Scott, please fix this obviously broken system:

Hi. This is the qmail-send program at zircon.seattle.wa.us.
I'm afraid I wasn't able to deliver your message to the following
addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<shildreth at allantgroup.com>:
199.67.51.115 does not like recipient.
Remote host said: 550 5.0.0 <shildreth at allantgroup.com>... broadband
speakeasy.net blocked due to Spam
Giving up on 199.67.51.115.