> On Apr 23, 2021, at 11:10 AM, Wietse Venema <wie...@porcupine.org> wrote:
>
> Indeed. The reason is that email should not be lost when Postfix
> is down (system is booting up, or Postfix is down for maintenance).
>
> We could certainly add a policy callout for local submission. But
> that is too much change for Postfix 3.6.0 which should be released
> soon.
A multi-instance null-client with delivery handled by a back-end
full MTA instance can support a local SMTP hop, and still reliably
queue local submission into the null client.
--
Viktor.
