[webmin-l] Problem with SpamCop

[Perisa A. <pe...@sa...>]

If there's someone to help regarding SpamCop black list?

I tried to explain to them that they are accusing my server for spam based on 
false header. Here's an example:

> Received: from rabbit.sajam.co.yu ([217.24.18.162])
> [trap servername] with SMTP; 13 Apr 2006 09:xx:xx -0700
> Received: from [217.24.178.93] (helo=vlxskz)
> by rabbit.sajam.co.yu with smtp (Exim 4.43)
> id x; Thu, 13 Apr 2006 18:xx:xx +0200
> Subject: convivial heels

Here is their explanation:
> The above headers are from a spam to the spamtraps. The top header shows our
> server receiving the spam from 217.24.18.162. The bottom header is forged.

Every time I asked them to send me a copy and every time below our address 
there was a line like this one, two days ago:
Received: from [217.24.178.93] (helo=vlxskz)

The first numbers are always 217.24 but other two varies. Also a text after 
'helo=' varies.
Above address is from Russia and several more addresses also. One was from 
Iran, one from Turkey etc.
Not one message carries my server's stamp.
A message samples was spam by content.

I was looking in ALL logs on my server but I've found nothing! Not a single 
trace of address or text related to the sample SpamCop sent to me.

Since lots of servers use SpamCop's list we were in problem for more than a 
month. Every other day we are on the list. The problem is that they don't want 
to remove address from the list upon a request. They set 24 hrs cycle 
automatic removal.

1. My question is how can I be sure that they are not trying to sell me a 
protection?
2. Is it possible to sent a message through a server WITHOUT A TRACE?
3. If it's possible, how can I prevent that?
4. Is there a tool to check that?

Please help if possible!

Regards to all,
P. Andjelic

P.S.
As I reported to SpamCop so many spam I asked them is it possible that I am a 
victim of some spamer revenge?
They said it's not.
I'm not sending spam samples any more...