December 2003
Beginner
278 pages
10h 47m
English
Content preview from Postfix: The Definitive GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Appendix A. Configuration Parameters
This appendix contains an alphabetical listing of parameters normally configured in the Postfix main.cf file. The brief descriptions are only meant to give you an idea of the purpose of the parameter. All of the parameters are fully documented in the sample configuration files and manpages that come with the Postfix distribution. This quick reference can point you in the right direction, but you will have to consult the body of this book or the online documentation to understand how each parameter works.
All of the parameters are listed with a type of value that should be assigned to it. Most of the value types are obvious. Those that require some explanation are described here:
- Explicit list
The parameter requires one or more items from a specific list of possible values. See the online documentation for a particular parameter to see what the possible values are.
- Lookup tables
When a parameter points to lookup tables, the tables are specified with their map type and the table name separated by a colon:
transport_map = hash:/etc/postfix/transport
- Pathname
The complete path to a file.
- Template
Some parameter values are specified as strings that contain macros:
smtpd_banner = $myhostname ESMTP $mail_name
The macros are expanded into their values at the time the parameter is used. See the online documentation to find out what macros are allowed for a particular template parameter.
- Time units
Many parameters are specified as an amount of time:
queue_run_delay ...
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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.