Hey,
I want to relay non-local mailboxes for one domain.

I set the domain up like this:

I put a transport map in the domain which is configured like this:

As told in the relay options if you want to relay not all recipient adresses you have to create blind mailboxes.
But how do you do that?

If i want to send a message to the recipient in Exchange Online and I dont have a mailbox created locally in mailcow, i get an error from Dovecot that the mailbox doesnt exits. But if I create a mailbox in mailcow, the mail will be transfered to the mailcow mailbox and not relayed.

What am I missing? Thank you very much

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