Thanks for the advice, I have tried most of what you have said,problem is who ever is doing it gets around all my filters. But I do not think my isp is doing enough to stop it.

Makes you wonder what use the system is and to what purpose it is being used, as I gather this spam,trying to sell DVD copy software etc, is giving my isp real problems.

The monitoring aspect worries me, is some one playing funny buggers.