You want to try an impressive open source software project? Create a framework that takes an email forwarded to a given address, turns it into an HTTP request with a JSON body, and sends that HTTP request to webhook.

It’s easy to make a proof of concept. Production grade is an entirely different story.

Remember to preserve conversations and forwarding. Make sure file attachments are handled and scanned for viruses. Make sure you watch out for recursive automatic forwarding. Make sure that any html is secure. And make sure it will scale well ... and I mean billions of emails a day well.