CleanPort has been founded in 2001 by the current CEO Jeroen Oostendorp, as a reaction on the first Managed Solutions for E-mail filtering introduced in the year 2000.

These solutions lacked flexibility, and were only suited for large companies. CleanPort developed with Managed E-Mail Security a solution that fits every type of organisation, no matter what size it has.

As a result multinationals, service Providers, and start-up's can be found among CleanPort's clients.
CleanPort has continuously innovated the Managed Services, and since 2001 a lot of new technology and techniques have been introduced.

Due to an ongoing increase in unwanted E-mail and the shift of the IT-market towards Managed Solutions the company has experienced a strong growth. In 2005 CleanPort acquired ISP with it's datacenter, so it now owns glassfiber connections to Europe's most important digital infrastructures.