How to confirm if an email was delivered?

When Netcore Email API attempts to deliver an email, the recipient's mail server acknowledges whether the message is delivered, bounced, or can't be delivered. Netcore Email API store these SMTP responses/remarks and are made available in the app.

You can check whether the email is delivered, bounced, dropped (or any other status) in the Netcore Email API user interface's live feed & API response.