resend.onEmailSent handles email.sent after Resend accepts a message for delivery. The recipient server may not have accepted it.
automations/record-resend-send.automation.ts
account defaults to the project Resend binding.
Trigger data
Returns the shared Resend outbound event fields withevent.type: "email.sent":
event preserves the original Resend envelope. Use the delivered trigger for downstream-server acceptance.