API endpoint for adding mail inboxes dynamically without using the UI#25

I am working on a product that this will be of great beenfit to, ability to add warmup emails, i have a list of emails on my database that i want to be able to add automatically to your service to be warmed up. It will save me a lot of stress currently this can only be done manually via the UI, one by one.

Even UI for batch import of emails and where one can export the emails and their inbox id in a CSV file will be super helpful.