Downloading 3D Mailbox 2.1.1.2 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The software is included in Communication Tools.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. This software is an intellectual property of World Market Watch, Inc. The program's installer file is generally known as 3DMailbox.exe. The most popular versions of the software are 2.1 and 1.2.
From the developer:
Email meets videogame! World's first 3-dimensional email client. Combines the best of email (including built-in SpamBayes spam filter) with the best video game technology. Turns the dry desert of your inbox into a creative oasis. No adware, malware, or spyware. Includes 4-click Video Mail.
You may want to check out more software, such as 3D-Fahrschule, IFS Builder 3d or 3D Systems Sense, which might be similar to 3D Mailbox.