Would it be possible to create a front-end form with MB Frontend Submission that does nothing but send an email?
So a form that does NOT create a post record.
I think it is possible but you need to create some custom code to modify the processing of the frontend form. If you just want to have a form to send the email, I think you can create a form with HTML code and send email, without using MB Frontend Submission form.
You can find more frontend hooks here https://docs.metabox.io/extensions/mb-frontend-submission/#hooks-1
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