Am using marketo smart campaign api to send emails through marketo email template, I need email status as response (Eg. email delivered, bounced) from api. But smart campaign returns success even though the email was not sent to lead record. Do we have any option to get response from api response.
Of course it returns success. The SMTP send occurs asynchronously (it would be catastrophic for performance it it did not).
Poll the Activity API if you want to see those logs.