Hello wonderful MC community !
I have set up a exchange online – mailcow hybrid setup and everything is working great.
Now as final step i setup an catchall on the mailcow and that works too.
But ONLY for mails sent to exchange that are OUTSIDE of mailcow.
If I send a mail from an account on the mailcow TO an exchange account these land in the mailcow catchall.
Logically this is correct, the mailbox does not exist locally.
But how can I make mailcow try to first relay it to exchange and ONLY if the mailbox doesn’t exist there either, throw it into the catchall.
I have googled now for over two hours but I cannot find a solution.
Maybe it’s just not possible?