[SOLVED] Is there a way or integration to my app receive a user email?

[NigelG]

Zapier will scan Gmail and you can call a workflow to save it to the database.

Or you can use their email address parser.

So perfectly possible.

Email to Create a thing / update a thing?

You could go Email > Zapier > Bubble API. Zapier has an email Parser, or can watch Gmail accounts.