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E-mail is considered as being the most widely used service on the Internet. So the TCP/IP protocol suite
offers a range of protocols allowing the easy management of email routing over the network.

Ever since computers have been networked together, people have used the network to send messages back and forth. There are several ways to send messages over the internet, but email is the most popular. If you have an email account, you can send a message to anyone else who also has an email acco....