Originally posted here by RoadClosed
Of course like I mentioned, if you run a large site with an e-bussiness you may have the resources to avoid a block ban.
Nah,

ISPs are fairly useless.

We run an e-business channel with moderate turnover £8M per year and we were having a problem with a mailserver that belonged to Blueyonder constantaly sending us one email over & over again. I blocked the IP, contacted Blueyoner and explained the problem. The helpdes/support guy had a real difficulty when he asked, can you give me your customer details, and I said I'm not a customer.

The long and short of it is that I was eventually put through to a manager & I explained that until the matter was resolved no email from that server would be delivered to us and that might have an impact on people who were customers of both of us. 3 months later I've had no contact to say the problem is resolved - Their mail server is still banned.

This may have an impact on our business, but it's a smaller impact than the DoS attack that was occuring.

Steve