Marco Gaiarin via Exim-users <exim-users@???> (Mi 30 Jan 2019 17:06:55 CET): >
> But some weeks ago i've done a general maintenance of my infrastructure, and
> i've discovered that exim refuse to deliver to some recipient because users
> are not known.
> Mail server was temporarly (more then 60 seconds) disconnected from domain
> controllers.
How does your Exim decide, if the user is known? Can you post the
router(s), that are responsible for your local users?