SubRosaSoft MailGuardian 1.5.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. SubRosaSoft MailGuardian for Mac lies within Communication Tools, more precisely E-mail. The actual developer of this Mac application is SubRosaSoft. We recommend checking the downloaded files with any free antivirus.
From the developer:
SubRosaSoft Mailguardian is a collection of tools that help guard your eMail. Integrating automated redirecting and very flexible blocking, it not only helps manage your important or urgent emails but can remove most unwanted emails before you have to bother with a long list of spam.
You may want to check out more Mac applications, such as Zimbra Toaster, PageSender or Mail to ToDo X, which might be similar to SubRosaSoft MailGuardian.