The 3.2.6 version of MyPopBarrier for Mac was available as a free download on our website. This Mac app is an intellectual property of Thomas Robisson. The application lies within Communication Tools, more precisely E-mail.
From the developer:
This program allows to remove your emails directly on the server. It can raise several accounts at the same time. Allow reply from within the application. Alert sounds are fully customizable.
You may want to check out more software for Mac, such as Mail Archiver X, MailMate or MailShoot, which might be similar to MyPopBarrier.