email.delivered
Fires when the recipient's mail server accepts your email. PostFrame stamps the delivered time, stores the SMTP response, and sends the event to your endpoint with a signature you can verify.
Delivery Confirmation Event
Common questions, straight answers.
What is in the email.delivered payload?
The common fields — email_id, message_id, from, to, subject, status, tags, created_at — plus smtp_response from the receiving server and the provider name.
How do I verify the webhook came from PostFrame?
Every delivery carries an X-PostFrame-Signature header of the form v1=<hex>. It is an HMAC-SHA256 of "<timestamp>.<body>" using the endpoint's signing secret, which you can rotate from the dashboard at any time.
What happens if my endpoint is down?
PostFrame retries five times with exponential backoff — 10, 20, 40, 80 and 160 seconds — and records every attempt, with the HTTP status and timing, in the endpoint's delivery log.
Can I try the endpoint before real traffic arrives?
Yes. Each webhook endpoint has a Test action that sends a sample event to your URL. Emails sent in test mode never dispatch webhooks, so your integration tests do not fire production hooks.
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