E-mail system consists of the below three components:
Mailer is popularly known as mail program, mail application or mail client, which allows the user to manage an email, read and compose it.
In order to receive, store and deliver an email we need a of mail server. It is very important for a mail server to be active and running all the time because, if the server crashes or goes down, email can be lost.
Information regarding emails is generally contained in a folder known as mailboxes.
Email working follows the client server approach. In this client is the mailer i.e. the mail application or mail program and server is a device that manages emails.
Below example will explain the user with basic steps which are involved in sending and receiving of emails. It gives us a better understanding of working of email system:
The below diagram gives pictorial representation of the steps discussed above:
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