Email is a critical mission application that requires 100% uptime guarantee. Through years of experience in providing email services, we have developed a robust infrastructure built on the fundamentals that all the components that contribute to the services must be redundant, resilience and scalable. Embedded into the network infrastructure combined with specialized network devices (Redundant Load Balancers), the infrastructure can automatically detect and heal failure of a service on a given system and to redirect requests (redundancy and resiliency) to functioning systems.

In order to meet the growth demands and the unexpected spikes in volume activities of users and threats from outside such as viruses and Spam, the system should have the scalability mechanism to increase capacity just by adding on demand servers on each of the functioning element as needed. In addition, our systems is integrated with firewalls, monitoring, rate controls software to block any threats from the Internet and to prevent degradation of services.

The Email System Infrastructure has redundancy in each of the core components that provide the email services. The redundancy is built within the server using RAID and within the network using multiple servers for each service function. In case of system failure, the Load Balancers detects automatically the failure and redirect requests to the other servers all transparent to user experience.

The Email System is clustered to six components: arrays of MX Servers, Mailstores, SMTP Servers, POP and IMAP Servers, Web Servers and Database servers.

The Email System is designed to have the scalability to handle millions of domains and users. As the users base grows and the demand increase for connections and storage, we add servers wherever capacity increase is needed.

Often we build a cluster for a customer to provide the capacity and isolate the activities of the customers from others.