We were startled. We did not expect the numbers to be that high and were surprised at the large volume of spam through just one zombie.
We are moving upstream and looking at the source of the spam problem, and it is obviously the zombies.
In those 20 days, this one computer received 5 million connection requests from spammers, and sent 18 million spam messages.
This was a pretty astonishing number for us. We knew that it would be a high volume, but this was an even greater volume of spam than we had anticipated passing through one computer.