From b5896ba9f6047e7031e2bdee0622d543e11a6734 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:46:30 +0200 Subject: Adding upstream version 3.4.23. Signed-off-by: Daniel Baumann --- proto/postconf.html.prolog | 105 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 proto/postconf.html.prolog (limited to 'proto/postconf.html.prolog') diff --git a/proto/postconf.html.prolog b/proto/postconf.html.prolog new file mode 100644 index 0000000..a7d41ee --- /dev/null +++ b/proto/postconf.html.prolog @@ -0,0 +1,105 @@ + + + + + + +Postfix Configuration Parameters + + + + + + + +

Postfix Configuration Parameters

+ +

Postfix main.cf file format

+ +

The Postfix main.cf configuration file specifies a very small +subset of all the parameters that control the operation of the +Postfix mail system. Parameters not explicitly specified are left +at their default values.

+ +

The general format of the main.cf file is as follows:

+ +

Each logical line is in the form "parameter = value". +Whitespace around the "=" is ignored, as is whitespace at the end +of a logical line.
+ +
Empty lines and whitespace-only lines are ignored, as are +lines whose first non-whitespace character is a `#'.
+ +
A logical line starts with non-whitespace text. A line +that starts with whitespace continues a logical line.
+ +
A parameter value may refer to other parameters.
+ +
- The expressions "$name" and "${name}" are recursively +replaced with the value of the named parameter. The parameter name +must contain only characters from the set [a-zA-Z0-9_]. +An undefined parameter value is replaced with the empty value.
  + +
- The expressions "${name?value}" and "${name?{value}}" are +replaced with "value" when "$name" is non-empty. The parameter name +must contain only characters from the set [a-zA-Z0-9_]. These forms are +supported with Postfix versions ≥ 2.2 and ≥ 3.0, respectively. +
  + +
- The expressions "${name:value}" and "${name:{value}}" are +replaced with "value" when "$name" is empty. The parameter name must +contain only characters from the set [a-zA-Z0-9_]. These forms are +supported with Postfix versions ≥ 2.2 and ≥ 3.0, respectively. +
  + +
- The expression "${name?{value1}:{value2}}" is replaced +with "value1" when "$name" is non-empty, and with "value2" when +"$name" is empty. The "{}" is required for "value1", optional for +"value2". The parameter name must contain only characters from the +set [a-zA-Z0-9_]. This form is supported with Postfix versions +≥ 3.0.
  + +
- The first item inside "${...}" may be a relational expression +of the form: "{value3} == {value4}". Besides the "==" (equality) +operator Postfix supports "!=" (inequality), "<", "≤", "≥", +and ">". The comparison is numerical when both operands are all +digits, otherwise the comparison is lexicographical. These forms +are supported with Postfix versions ≥ 3.0.
  + +
- Each "value" is subject to recursive named parameter and +relational expression evaluation, except where noted.
  + +
- Whitespace before or after each "{value}" is ignored.
  + +
- Specify "$$" to produce a single "$" character.
  + +
- The legacy form "$(...)" is equivalent to the preferred +form "${...}".
  + +
+ +
When the same parameter is defined multiple times, only +the last instance is remembered.
+ +
Otherwise, the order of main.cf parameter definitions does +not matter.
+ +

+ +

The remainder of this document is a description of all Postfix +configuration parameters. Default values are shown after the +parameter name in parentheses, and can be looked up with the +"postconf -d" command.

+ +

Note: this is not an invitation to make changes to Postfix +configuration parameters. Unnecessary changes are likely to impair +the operation of the mail system.

+ +

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