Ipcop+copfilter /Spamassasin

[Evan]

List,
Over the last few weeks we have deployed ipcop and more recently the add 
on copfilter.

Periodically we notice our mail just simply is passed through to our 
exchange server. blocked by copfilter.

I can only assume any attempts by our isp to hand the messsages over is 
being blocked or rejected. As the process runs as an smtp proxy When it 
runs it runs ok but the unreliability of it precludes its long term use.

I was wondering if anyone has experienced this or better yet can we 
deploy spamassasin instead on our gateway to do this. Bearing in mind 
copfilter does use spamassasin but it has been tailored to fit into 
ipcop configuration.

Any thoughts on this would be appreciated