Friend, what is the function of the Dns and Mail server. first of all I want to tell you that the work of DNS is to do the automatic IP all the computer and what is the name of the mail server that is known by the name itself is that mail is send to server where the mail is collected and their data is ready.
friends, I am going to tell you through the video given below today, how do configure the mail and dns server in cisco packet tracer, which look carefully at that video inside the packet tracer and follow all its steps carefully.
Cyberdotin 
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