Email Statuses Defined
Processed: The message has been received and is in the process of being delivered.
Delivered: The message has been successfully delivered to the receiving server
Open: The recipient has opened the HTML message. Open Tracking needs to be enabled for this type of event.
*Click*: Recipient clicked on a link within the message. Click Tracking needs to be enabled for this type of event.
Bounce: The receiving server could not or would not accept mail to this recipient permanently.
Deferred: The receiving server temporarily rejected the message.
*No Status:* SendGrid has yet to detect a status from the recipient's email server