[pve-devel] [PATCH installer] install: set postfix config compatibility level to 3.6 to avoid warning

[Stoiko Ivanov]

Thanks for taking a look at this!

Put shortly don't see anything that should break with the updated
compatibility_level for all our products apart from PMG (see below):

Reviewed-by: Stoiko Ivanov <s.ivanov at proxmox.com>

For PMG it should work fine as well (mostly as a note to self for the
upcoming PMG 9.0): I quickly checked our use of the affected
config-options in the PMG config templates - and the only things that
might cause issues with PMG were:
* respectful_logging=yes (because of the log-tracker, but that seems a
  non-issue from a quick grep there, and if not we need to fix it up there
  anyways)
* xxx_security_level (client-side TLS) - currently this would change the
  behavior of the TLS Settings - but if this should be problematic for any
  deployment (where they need to actively disable outbound opportunistic
  TLS) - I'd rather adapt our config with a new setting to explicitly
  disable it.

On Tue,  5 Aug 2025 11:54:26 +0200
Shannon Sterz <s.sterz at proxmox.com> wrote:

> otherwise postfix will complain about using a backward compatible
> config. since we don't seem to use anything that would be problematic
> here anyway [1], just bump the version to avoid spamming the logs.
> 
> [1]: https://www.postfix.org/COMPATIBILITY_README.html
> 
> Signed-off-by: Shannon Sterz <s.sterz at proxmox.com>
> ---
> 
> tested this on two nodes by adapting the config there and running
> `postfix reload`. setting this to 3.6 meant no more warnings, going back
> down to 2 would warn again.
> 
>  Proxmox/Install.pm | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Proxmox/Install.pm b/Proxmox/Install.pm
> index 3159dcc..f40d20d 100644
> --- a/Proxmox/Install.pm
> +++ b/Proxmox/Install.pm
> @@ -42,7 +42,7 @@ mynetworks = 127.0.0.0/8
>  inet_interfaces = loopback-only
>  recipient_delimiter = +
> 
> -compatibility_level = 2
> +compatibility_level = 3.6
> 
>  _EOD
> 
> --
> 2.47.2
> 
> 
> 
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