A Linux Email and Collaboration Server

PostPath chose Linux as the platform for its email server for a number of reasons:

Superior performance for both operating system and filing systems
Most cost-effective option
Unix email architecture is standard for high-volume high-reliability Internet infrastructure, with many options for exploiting other open-standards and open-systems
A platform of choice for some IT organizations
Enables programming-for-safety ("safe buffers") etc.
A broad development community that is creating key future innovations in email and collaboration