You had a bad experience, ipso facto everyone should stop using a service that works. That's bullshit. Spam is far worse than losing one or two emails because someone's IT guy didn't have the balls to tell his boss to keep the two ISP connections running concurrently while they tested everything. Then you complain about the user not receiving the mail? The best thing about a DNSBL is that you don't receive the mail, reducing bandwidth, reducing cost. Also, you couldn't have just forwarded all mail through your ISP? Why are you guys all so sour when you get listed on a blacklist for a few days, there are workarounds for you, but not many for the spammers.