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How Email Works

Here is a thorough article about emails, put together by Marshall Brain and Tim Crosby. Inside the article:
Introduction to How Email Works; A Simple Email Server; More Complex Servers; The SMTP Server; The POP3 and IMAP Servers; IMAP Problems and Attachments; Free and Paid Email Services; Email Etiquette, and others.

Introduction to How Email Works:

Every day, the citizens of the Internet send each other billions of email messages. If you're online a lot, you yourself may send a dozen or more emails each day without even thinking about it. Obviously, email has become an extremely popular communication tool. Have you ever wondered how email gets from your computer to a friend halfway around the world?

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