Hey @fakof14! With my previous suggestion, the Gmail integration recipe would still be used to send out the many emails from the source board rather than the board that is mirroring from the source board.
If you are mirroring a status column from Board 1 in Board 2, then you would set up the Gmail integration recipe on Board 1. Using the Mirror Column, you can actually change the status of an item in Board 1 directly from Board 2 in order to trigger the Gmail integration (from Board 1).
This would save your team from having to send out hundreds of emails manually!