Zimbra customer XMission (a managed service provider in Utah) prides itself on a well-earned reputation for customer privacy and security, which inluenced its choice of a collaboration platform. he company wanted tools that could deliver granular and domain-wide spam control, virus and malware iltering, and security. It was even able to boost protection through a custom Zimlet (a method to integrate systems and content with Zimbra Collaboration) that allows XMission to add extra layers of spam iltering.