One Comment

  1. Interestingly, shows up as one of the more common blacklists used in this analysis, but then is missing from the data graphs in Return Path’s guide. As the CEO of invaluement, I can’t speak for Return Path and I don’t have any “inside info” on the reason for this. But I can make an educated guess. It could very well have to do with the fact that invaluement’s two sender-IP blacklists are trying to catch the more sneaky spams… ones often missed by the other large blacklists (or just not caught yet). At the same time, ivmSIP and ivmSIP/24 both do NOT try very hard to list ALL of the spammers’ IPs. This makes the invaluement DNSBLs fantastic for blocking very elusive spams that would otherwise make it into the inbox… but perhaps not as beneficial for sizing up these kind of trends provided by Return Path’s article.

Comments are closed.