December 2003
Beginner
278 pages
10h 47m
English
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Administration
Running a mail server is an ongoing task. You cannot start it and forget about it. There are periodic administrative tasks, and you should regularly check for any problems your system might have. This section discusses many of those tasks and how to accomplish them with Postfix.
Postfix provides a utility through the postfix command to validate many aspects of your installation. The command checks for configuration problems, looks at directory and file ownership, and creates any missing directories. Executing:
# postfix checkshould report no messages on a correctly installed system. If there are any problems, the command reports them to you both on the screen and in your log file.
Logging
Since Postfix is a long-running program, you should regularly check your system’s log file for warnings or messages. Things can change on your system that might impact Postfix. Almost all Postfix activity, successful or not, is logged. Whenever you start or reload Postfix, it is a good idea to check your log file for messages.
Postfix logging is accomplished by using your system’s syslog daemon. System log files are an aspect of system administration that vary across versions of Unix, so you may have to consult your own system documentation to fully understand Postfix logging.
In general, the syslog daemon (syslogd) receives messages from various
system processes and writes them to their final destination (often a
file). syslogd organizes messages according to their importance and the ...
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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.