May 2001
Beginner
624 pages
13h 6m
English
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Chapter 4. DNS and Postfix
One of the most important yet misunderstood aspects of an e-mail system is the use of hostnames. It is crucial to ensure that hostnames are defined properly in order for mail systems to communicate. Postfix is no different.
The domain name system (DNS) was developed to allow systems to communicate using a hierarchy of hostnames instead of the native IP numbering scheme. DNS also identifies servers that provide special services for domains, such as e-mail. This is where DNS becomes crucial for e-mail servers.
Although knowledge of DNS isn't essential for installing and configuring Postfix, it certainly helps when you are trying to troubleshoot mail problems. At some point in your mail administration career, you will most ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.