Wietse Venema via Postfix-users:
> With this in master.cf:
>
> dkim-sign unix - n n - 0 spawn
> user=_postfix_xlocal argv=/tmp/s-dkim-sign
> --milter-macro-sign {daemon_name},sign
> --key rsa-sha256,rsa,/tmp/pri-rsa.pem
>
> These are options to a non-Postfix program, so I need to investigate
> why the syntax parser is treating it as Postfix syntax.
This behavior was introduced on 20140927, and it is partially
documented in the master(5) manpage.
Other command-line arguments
Specify "{" and "}" around command arguments that contain
whitespace (Postfix 3.0 and later). Whitespace after"{"
and before "}" is ignored.
The text should have said:
Other command-line arguments
Specify "{" and "}" around command arguments that must start
with "{" or that must contain whitespace (Postfix 3.0 and
later). These outer "{" and "}" are removed from the input,
together with any leading or trailing whitespace.
Basically, Postfix strips one level of {} around any command-line
argument that starts with "{".
In that light, if you want "{daemon_name},sign", you need to specify
{{daemon_name},sign} like this:
dkim-sign unix - n n - 0 spawn
user=_postfix_xlocal argv=/tmp/s-dkim-sign
--milter-macro-sign {{daemon_name},sign}
--key rsa-sha256,rsa,/tmp/pri-rsa.pem
I'll update the manpage text.
Wietse
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