GMS (GMS) is a commercial mail and groupware server developed by Gordano Ltd.
It runs on Windows, Linux, Solaris, and AIX.
Originally called NTMail[1] which was the first commercially available mail for the Windows platform[citation needed], the products were rebranded to the Gordano Messaging Suite in August 2002 to reflect the support for additional hardware platforms and operating systems.
The features of GMS include encrypted access using SSL, anti-virus and anti-spam protection, over-the-air handheld synchronization, web based webmail and calendaring interfaces and a plugin for Microsoft Outlook allowing Microsoft Exchange style functionality.
Administration is performed by a web browser using HTTP Native support for full groupware features exists for these clients: Reviews of version 15: