Derived from Electronic Mail, Email works like a letter, the only difference is how it is exchanged. Computers use the TCP/IP protocol to send and receive email messages in the structure of packets. Nowadays, information or messages are exchanged between hosts using also the Simple Mail Transfer Protocol with programs named mail transfer agents. Users can interpret or download their messages from their chosen servers with standard protocols (POP, IMAP). Email has gained reputation with the spread of the Internet. In many cases, email has become the preferred method of communication. The first thing you need to send and receive emails is an email address.

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