Research to get more information

Building our blacklists based on gathered information through hitting junk our inboxes, spam traps, and analyzing logs, we started to develop our blacklists based directly on servers. With about 50 entries, we got better then the public blacklists were using and could stop most junk. These blacklists became a big success because we blocked most of the same unwanted emails for our users, which they have seen hundreds or thousands of times. For receivers, they were all the same. If you are an email admin, you know what we are talking about.

But as our built list grew, we need to find a solution to check, update, and extend the entries with less manual work. With time the records got stale, or IP ranges were used for valid traffic; we need to figure out how to manage better and see what we can do to improve this.

This success and need for more information was the point we started to build a service, where we could see, update and improve our blacklists, which were at this point, our best line of defense against mass junk and unwanted emails - especially the recurring ones.