200 Response From Signup In Prod, But No Email

@kapa.ai After getting my app deployed on Fly, I am able to get to my landing page successfully via my custom domain and interact with the login and signup screens. However, when I register via email/password, I am not getting the registration email. In my console's network tab, I see a 200 response from https://xyz.app/auth/email/signup after I click the register button. The remote address in the request matches the IP of my Fly xyz-client app. I have already reset the

MAILGUN_API_KEY

MAILGUN_API_KEY

and

MAILGUN_DOMAIN

MAILGUN_DOMAIN

on my Fly server app to make sure there we no typos, which I am using in my local development environment where I am able to receive the registration emails fine. In my Mailgun dashboard, I do not see any emails sent, bounced, or blocked. I am able to see the emails that sent in my development environment on my Mailgun dashboard fine. Provide me with a step by step troubleshooting checklist after carefully weighing all possible issues and what is most likely wrong.