Front-end Application Servers
There are four core email-related services offered by Rediffmail EnterprisePro: inbound email (SMTP), outbound email (SMTP), remote email client access (POP & IMAP), and web-based email access (webmail). Each of these four services operates from their own high performance cluster of servers. Each cluster is load-balanced by a pair of network load balancers. These load-balancing devices are capable of sensing failure in cluster nodes and seamlessly route traffic to the other functioning nodes. When a server fails, engineers are alerted and issues are diagnosed and resolved before the server is made available again to the server cluster. Excess cluster capacity is implemented, such that multiple server failures could occur without a notable slip in performance.
