While I am in the process of creating my own anti-spam email server I have been using two of my older domain names as test domains. I retired both domains on April 1st, 2005 and both domains had between 500 and 1,000 active using at the time I retired them.
It is now seven months later and these two domains are still getting spam like you wouldn’t believe.
As part of my server and the statistics that I am planning on keeping I started tracking the unique IP Addresses that are making connections to these two domains. The first day of tracking any I have nearly 1100 unique IP addresses that have made connections, and this is only since midnight.
Not only that but I often see the same IP address making multiple connections in a short period of time.
Of course this just going to and fuel to the argument that spam is a larger problem then people realize. Even those of us who complain about it constantly 