MyPopBarrierMyPopBarrier 
The latest version of MyPopBarrier is 3.2 on Mac Informer. It is a perfect match for E-mail in the Communication category.
MyPopBarrier is a powerful email management tool designed to help you purge your inbox from unwanted messages before they even reach your local email client. With its simple interface and easy configuration, it’s perfect for users who want a hassle-free solution to maintain a clean inbox. Set up multiple email accounts with ease, and get started quickly, though the help documentation could use a bit more clarity for beginners.
The core functionality of MyPopBarrier lies in its ability to filter and manage incoming messages using customizable white and black lists. The black list comes pre-configured with common spam triggers, but you can add more terms to block specific unwanted emails. Likewise, trusted domains can be added to your white list to prevent false positives. Once your messages are imported, MyPopBarrier marks flagged emails with a red dot, indicating they will be deleted when you click the “Purge” button. You can also change the status of an email with a simple click, giving you full control over your inbox.
MyPopBarrier also offers a range of automation features to save you time. You can schedule automatic message downloads and even set up post-purging actions, such as launching your preferred email client. Despite a few minor issues, like the resizing of a window, MyPopBarrier performs exceptionally well, and the best part is that it’s free to use indefinitely. The optional registration is more of a donation than a paid subscription, making it accessible for everyone.