How to put raw email in dovecot user's inbox?

Question

Mail server

Good afternoon. I receive Raw Email from an external source. Now we are sending it to the desired user via smtp, but at the same time, the headers I need (such as message-id) change.

Is there any way to put this email directly into the user's mailbox? Maybe, correcting some fields inside is not so important. The main thing - without forwarding via SMTP.