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Ubuntu Server Essentials by Abdelmonam Kouka

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Deploying an e-mail server

Along with the Web, e-mail is probably the service that most people think of when they think of the Internet. Like web servers, e-mail servers have traditionally been pretty tricky to set up, and there are many guides and books on this subject. However, you will find that e-mail servers are pretty easy to set up and use under Ubuntu.

Installing an e-mail server requires you to manage the sending and receiving of e-mails. These two notions are important because they implement two different protocols—SMTP to send, and POP or IMAP to receive the messages.

When a user sends an e-mail it is in fact never in direct contact with the recipient. The e-mail goes through at least two servers that are, in order, the sending server ...

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