lammert - 7:20 pm on Mar 4, 2010 (gmt 0)

The ISP I often use blocks client connections if the ISP detects that SPAM or DDOS attacks are originating from that connection. Their Abuse department then helps the customer with instructions about how to clean the PC. They also offer free virus scanners, and firewall software to all their clients and run server based virus scanners on all incoming and outgoing emails. I thought this was common practice with most ISPs...