email.bounced
Fires when the receiving server refuses the message. The payload names the bounce as hard, soft or undetermined, carries the provider's sub-type and diagnostic code, and the address is suppressed when the rule says so.
Bounce Classification
Common questions, straight answers.
What is in the email.bounced payload?
The common fields — email_id, message_id, from, to, subject, status, tags, created_at — plus bounce_type (hard, soft or undetermined), bounce_sub_type, diagnostic_code 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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