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Webhook Event

email.unsubscribed

Fires when a recipient uses the one-click unsubscribe button or the unsubscribe link. The address is suppressed for your workspace and the method that was used is in the payload.

Start freeAll webhook events

Unsubscribe Processing

One-click detection
RFC 8058 List-Unsubscribe-Post header enables one-click unsubscribe directly from the email client
Link click detection
Traditional unsubscribe link clicks are also captured and processed
Suppression
The address is added to your workspace's suppression list with the reason "unsubscribed" and is skipped on future sends
Signed tokens
Each unsubscribe link carries an HMAC token bound to the email it was sent in, so nobody can unsubscribe someone else
Payload Fields
to
The recipient list of the email
method
list-unsubscribe-post (one-click) or link
source
How the opt-out arrived
timestamp
Unix seconds at the top level of the event. Every event also carries data.email_id, message_id, from, to, subject, status, tags and created_at

Keep exploring PostFrame

Unsubscribe management

One-click headers, signed links and groups.

Open Unsubscribe management

email.complained

Fires on a spam complaint.

Open email.complained

Separate suppression lists

Where the address ends up.

Open Separate suppression lists

Questions

Common questions, straight answers.

What is in the email.unsubscribed payload?

The common fields — email_id, message_id, from, to, subject, status, tags, created_at — plus method (list-unsubscribe-post or link) and source.

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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