GMX (Global Message eXchange) email and web portal

GMX, which stands for Global Message eXchange, is a prominent German email service provider and web portal founded in 1997. Originally established in Karlsruhe, Germany, the brand rapidly grew to become one of the leading webmail services in the DACH region (Germany, Austria, Switzerland), offering free and premium communication services.

Today, GMX is owned by United Internet AG, one of Germany's largest internet service providers. While the brand expanded its reach to international markets—specifically launching GMX.com for the US and UK—the core infrastructure, development, and server hosting remain primarily based in Germany. GMX operates under the 1&1 Mail & Media division of United Internet, sharing its technical platform with other major German internet brands like WEB.DE.