Download of Mail Detective 1.3.1 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application belongs to Communication Tools. The most popular version of the software is 1.2.
This free Mac application is a product of Stefan Keller. This free program can be installed on Mac OS X 10.9.0 or later. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Mail Detective helps you decide if that email in your inbox is valid or scam by trying to trace the geographic origin of an email. Simply drag an email message from your mail client onto Mail Detective 's window or app icon and the app will show you the country and -- if possible -- the city this message was sent from.
You may want to check out more Mac applications, such as Scene Detector, DigitalTweaks Apple Mail Import Tool or Mail.Ru Agent, which might be related to Mail Detective.