Why exchange directs letters to the killed bases of boxes?

Question

Mail server

We have Exchange 2013, on which the database died due to an unsuccessful update. We managed to attach the database in the form of a recovery database, the mailboxes were disabled and recreated, after which the letters were restored to new mailboxes via new-mailboxrestorerequest. The base where they were originally was removed after that.
And now there is an "unreachable domain" in the queue with a bunch of messages held up because "There is currently no route to the mailbox database." Including letters that were sent from external addresses, from various devices via smtp, and so on. That is, the problem is definitely not in the Outlook cache. The letter is sent to the address of the box, which now lives in a new, normal database, but used to live in the now remote one.
At the same time, some of the letters go normally, some do not. I don't understand the logic. Added X.500 addresses to the list of addresses of affected users just in case. What to do - I do not think.

Answer 1

Probably something with the inheritance of rights to the database, I would start digging from the ExchBPA run.

Answer 2

Nikolay, did you manage to solve the problem? Ran into the exact same one!