DeliveryEventType  
    The type of delivery events:
- SEND- The send request was successful and SES will attempt to deliver the message to the recipient’s mail server. (If account-level or global suppression is being used, SES will still count it as a send, but delivery is suppressed.)
- DELIVERY- SES successfully delivered the email to the recipient's mail server. Excludes deliveries to the mailbox simulator and emails addressed to more than one recipient.
- TRANSIENT_BOUNCE- Feedback received for delivery failures excluding issues with non-existent mailboxes. Excludes bounces from the mailbox simulator, and those from emails addressed to more than one recipient.
- PERMANENT_BOUNCE- Feedback received for emails sent to non-existent mailboxes. Excludes bounces from the mailbox simulator, those originating from your account-level suppression list (if enabled), and those from emails addressed to more than one recipient.
- UNDETERMINED_BOUNCE- SES was unable to determine the bounce reason.
- COMPLAINT- Complaint received for the email. This excludes complaints from the mailbox simulator, those originating from your account-level suppression list (if enabled), and those from emails addressed to more than one recipient.