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theist
Asked: 2014-07-04 04:49:43 +0800 CST

use two different configs in one postfix, is it possible?

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I'm wondering if is it possible to specify another main.cf for the configuration of smptd service in another port paired with normal config in standard port.

I know that is it possible to override main.cf settings in master.cf using the -o <key>=<value> parameter for smtpd service definitions but I'm asking for a way to directly tell to smtpd to read another main configuration file.

Can it be done?

postfix

3 Answers

  1. A quick look through the source code leads me to believe that this isn't possible with the native distro package.

    The filename main.cf is hard-coded in several places.

    You could try modifying the source before compiling it (sed -ri 's/main.cf/mymain.cf/') but I doubt that'll work without a hitch.

    TL;DR: Make a file link (ln).

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  3. Postfix uses two hard-coded filename for its config main.cf and master.cf (See @Belmin answer).

    If your purpose is running postfix via cli with specific file configuration (like ./someprograms -c myconfigfile.cf), you can use -C parameter. Instead a file name, you can specify a directory where main.cf and master.cf reside. So if you have main.cf and master.cf inside a directory /etc/anotherpostfixconf/, then you can start posfix by 

    postfix -C /etc/anotherpostfixconf/

    See Postfix manual - postfix(1) for further explanation.

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