Katherine,
We have done that since day one. The problem is that the problem people have multiple class C's of ip addresses, so blocking one ip doesn't really help because they have about 10k ip addresses. So we are actually looking at spam filtering software, that actually analyses the message of the text kind of like spam filtering software does, I just don't know how well that will work long term. Right now it seems we have 2 companies that are doing the spamming. So we are focusing on those two and see if we can stop them.
We have actually thought about gving our customers the ability to say that an email they receive is spam and then we can possibly block that way as well. So we are looking at a lot of different options. But we are completely open to any and all suggestions.
Donny