1-  /etc/postfix/main.cf: multi_instance_directories = /etc/postfix-dmz
2- remove multi_instance_wrapper & multi_instance_directories from
/etc/postfix-dmz/main.cf
3- (optional) set multi_instance_name in both, to different names

All this is described/explained at
https://www.postfix.org/MULTI_INSTANCE_README.html#params

On Mon, Jul 27, 2026 at 6:31 PM Michael via Postfix-users <
[email protected]> wrote:

> Hi,
>
> In /etc/postfix/main.cf
>
> multi_instance_wrapper = ${command_directory}/postmulti -p --
> multi_instance_enable = yes
> multi_instance_directories = /etc/postfix /etc/postfix-dmz
> multi_instance_name =
>
> and in /etc/postfix-dmz/main.cf
>
> multi_instance_wrapper = ${command_directory}/postmulti -p --
> multi_instance_enable = yes
> multi_instance_directories = /etc/postfix-dmz
>
> July 27, 2026 at 11:50 PM, "Viktor Dukhovni via Postfix-users" <
> [email protected]
> <[email protected]?to=%22Viktor%20Dukhovni%20via%20Postfix-users%22%20%3Cpostfix-users%40postfix.org%3E>>
> wrote:
>
> On Mon, Jul 27, 2026 at 12:50:04PM +0000, Michael via Postfix-users wrote:
>
> Hi,
>
> When I do the the command postmulti -l I get the following
> -               -               y         /etc/postfix
> -               -               y         /etc/postfix
> postfix-dmz     -       y         /etc/postfix-dmz
>
> Also postmulti -p status gives
> postfix/postfix-script: the Postfix mail system is running: PID: 53437
> postfix/postfix-script: the Postfix mail system is running: PID: 53437
> postfix-dmz/postfix-script: the Postfix mail system is running: PID: 53512
>
>
> You don't have a second instance, but your configuration lists the
> single default instance twice.
>
> What is the setting of "multi_instance_directories" in
> /etc/postfix/main.cf?
>
> --
> Viktor. 🇺🇦 Слава Україні!
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>
>
>
> Regards
> Michael Orgill
> Sebis
> Phone: (07) 3892 4170
> Mobile: 0439 735 329
>
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