These days and ages spam is still a major problem and there are lots of blacklists around for years, but the problem using them is that you are almost always at risk to block legit emails too, not just spam.

The JustSpam blacklist is an attempt to make it better and we strongly believe in providing a first class email reputation system free of charge.

Free of charge means what it sounds like – Usage of this system is free of charge no matter you are using it commercial or noncommercial and also removals are free of charge.