MailMum - IP blacklisting admins can trust.
This blacklist is fundamentally different, because you will be able to create, maintain and control it yourself. It's all in your hands.
We have been running this system for over 4 years as admins and decided to make it a public product because it provides such valuable services for us.
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!