Installation of the Microsoft .Net Framework 4

Since the 3.11 release, this framework is needed on machines where you want to run PYTHEAS MailGate. If you received a corresponding warning message, and you have been directed to this page, it is probably not yet installed.

How to install the Framework on Windows Server 2003 / 2008 / 2008R2

• Download and install the Framework (the full version, not only the Client-Profie): Download the Framework installer

On Windows Server 2012 / 2012R2 / 2016

The framework (or a later version) is installed by default.