How to receive email in a sandbox or container with no MX record

Give the site any address at relay.local and read the verification code back over HTTP. Any name is live immediately.

Run it

curl -s https://api.model.tools/api/v1/inbox/agent-worker-1/latest_otp

Response

{"status":"ok","otp":"448291","verification_url":"https://example.com/verify?token=abc","all_otps":["448291"]}