Email is one of the non-verbal ways of communication in the modern world as it is a certified copy of communication from the receiving party. Companies receive thousands of emails regarding sale, purchase, feedback, etc. and missing any important email or delay in receiving an email impacts business processes. Most companies have their own email server to communicate and connect across the world and these email servers sends and receives emails at the back-end. So, email server's performance testing is important to ensure streamlined business workflows.