Simple Mail Transfer Protocol (SMTP) is used to send or “transfer” email messages from one client/server to another. Being the only dedicated protocol for sending emails, SMTP is widely used by popular email clients such as Outlook, Gmail, Apple Mail, and Yahoo Mail. It’s also how bulk mail (both legitimate and spam) are transmitted across the internet.
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Even today, email continues to be a reliable form of communication between both individuals and multinational corporations. Although transferring an email is as simple as clicking on the “send” button, have you ever paused to think about what goes on behind the scenes when you do so? A complex mechanism sits behind this seemingly simple task of sending an email and at the center of it all is an email protocol called SMTP. In this article, let’s go over the basics of SMTP—what it is, how it’s used, why it’s important, and how you can successfully set up an SMTP