I recently received an email from my host, it was a forwarded message from C0mcast. It said this: The next day I got another email saying I have to respond within 72 hours and if I think it is was not spam then to say so. I did send them an email accidentally, a c0mcast email address was in one of my mailing lists and I did not realise. What should I do? What do I respond with? Thanks.