I am on the peaks list, but I didn’t get a confirmation e-mail. How come?

Some ISPs are more aggressive in filtering spam than others. The most aggressive methods (reverse DNS lookup, for example) will block as many desired messages as undesired. We have found that this is the case with Comcast’s Spam filter, and may be the case with others as well. Rest assured, if your name appears on the Peak List you are registered for that peak.