Task $1$:

A prominent university is facing challenges with its email communication system, which is primarily used by students, faculty, and staff for various academic and administrative purposes. The university is seeking to enhance the efficiency and reliability of its email system. Establish a mail communication server within a virtual environment, comprising of at least one mail server and two clients. The deployment of the mail server should be illustrated using snapshots and a practical model should be available in the lab. This task requires a step$-$by$-$step configuration of the mail communication server, utilizing an appropriate mail communication server and operating system. All commands and steps used in the configuration should be thoroughly explained with duly recognized sources of information.

Give me the answer step by step