Basic Postfix Configuration and Operation
Because Postfix is the Ubuntu-recommended MTA, the following sections provide a brief explanation and examples for configuring and operating your email system. As mentioned earlier, however, Postfix is an extremely complex program with many configuration options. Therefore, this chapter only covers some of the basics.
Postfix is not installed by default. To use it, install the postfix package from the Ubuntu software repositories. During installation, you are asked a series of questions to help configure Postfix immediately. Research the settings for your situation before you start; some are merely preferential, but others are based on your hardware, network, and use case. You are asked the following: ...
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