> No, but in the course of doing their business, this third party cannot wrongfully interfere with our business. Um... they're an email filtering company, and

> No, but in the course of doing their business, this third party cannot wrongfully interfere with our business. Um... they're an email filtering company, and you're an email sending company. Interfering with your business is their business! That's what Comcast is paying them to do --- Comcast want your business interfered with! > As to the rest of your comment, you are assuming that the problem was the content (advertising). I'm afraid you've missed my point here. The content is important, because having advertising in the content means that they will have already written you off as a reputable company. I'm pretty sure the conversation at their end went something like: A. Hey, Bob, I've just got an email from someone claiming we shouldn't be blocking their email, but they're on the honeypot list. B. Sigh. Again? Do we have one of their messages? A. Yup. Here. B. <spends two seconds skimming message> It's got advertising in it. They're a spammer. Screw 'em. (It may not even have gone that far. I have no idea what format your newsletters are in, but if they score badly they may not even have bothered to look at them.) My point is: you may not be a bad guy, but to an awful lot of people in the SMTP industry, you're going to look just like one.