Thanks for your reply. I have looked at the FAQs but I readily admit that I haven't ploughed through everyhing. If you have tech support phone number or e-mail contact for Spamcop I'd be grateful to receive it or to be told (with some precision) where to find it. Below is a sample header from one of the SPAMS caught in Held Mail:
Date: Thu, 4 Nov 2004 23:01:37 +0700 [04/11/04 11:01:37 EST]
From: Mail Delivery Subsystem <MAILER-DAEMON[at]DOPA.GO.TH>
Subject: Returned mail: see transcript for details
Headers: Show All Headers
ERROR: Your message could not be delivered.
The mail server generated the following error message:
The original message was received at Thu, 4 Nov 2004 23:01:22 +0700
----- The following addresses had permanent fatal errors -----
(reason: 550 5.1.1 <cross[at]khonthai.com>... User unknown)
----- Transcript of session follows -----
... while talking to khonthai.khonthai.com.:
>>> RCPT To:<cross[at]khonthai.com>
<<< 550 5.1.1 <cross[at]khonthai.com>... User unknown
550 5.1.1 <cross[at]khonthai.com>... User unknown
Needless to say, there is no e-mail user with the address 'goss[at]asgardmedia.com', though asgardmedia is our domain. This has continued throughout the day.