Download of Mailbox Filter 4.1.18 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most frequent installation filenames for the software are: c3.exe, C4.exe and MBF4Wait.exe etc. The program relates to Communication Tools. We recommend checking the downloaded files with any free antivirus. The actual developer of the program is Applications Unlimited. The most popular versions among the software users are 4.1 and 4.0.
From the developer:
Mailbox Filter is the only spam filter that automatically learns to think like you -- not for you -- about your email. Unlike spam blockers, Mailbox Filter is a "SMART" spam filter so it won't lose your important email.
Our exclusive Smart Filter TechnologyTM instantly sorts your important email from spam and always delivers precisely the email you want, where you want it.
You get extra email virus protection too!
You may want to check out more software, such as Filter Forge Freepack 2 - Photo Effects, Filter Forge or Filter Forge Freepack 4 - Distortions, which might be similar to Mailbox Filter.