Well, this is probably a list AUP violation as well, but.... what we do is inform the customer that forging headers is a breach of our T&C, and repeated violations will result in the closure of their account. Most don't realise the problems they're causing; once its explained to them, they stop doing it. I spoke with the software author some time ago about this issue, and he was reluctant to disable it. FWIW, I do believe that issues that impact ISP performance should be on topic here. This new worm has definitely tested our mail system - total viruses intercepted for Oct is currently sitting at 1500.... Gordon Smith CCNA Network Operations Manager MoreNet Ltd - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog