Send16 Com Webhooks

generated: '2026-10-31'
method: searched
generator: extract-docs-artifacts.py (local)
source: https://send16.com/docs/webhooks
sources:
- https://send16.com/docs/webhooks
description: Send16 posts JSON webhook payloads signed with HMAC‑SHA256 and retries failed deliveries for up to 24 hours.
events:
- event: email.delivered
  description: The recipient mail server accepted the message.
- event: email.bounced
  description: Hard or soft bounce from the recipient domain.
- event: email.complained
  description: Recipient hit the spam button (Feedback Loop / ARF report).
- event: email.opened
  description: Tracking pixel loaded (best‑effort, blocked by Mail Privacy Protection on iOS).
- event: email.clicked
  description: Recipient clicked a tracked link inside the email.
- event: contact.created
  description: A new contact was created (API, form, or import).
- event: contact.updated
  description: An existing contact was modified.
- event: contact.deleted
  description: A contact was deleted.
- event: contact.subscribed
  description: A contact resubscribed to all topics.
- event: contact.unsubscribed
  description: A contact unsubscribed (one‑click or via preference center).
- event: campaign.sent
  description: Broadcast finished enqueueing all recipients.
- event: campaign.completed
  description: Broadcast finished sending the last recipient.
- event: form.submitted
  description: Embedded Send16 form (web component or hosted form) received a submission.
delivery:
  signature: HMAC‑SHA256 of the raw request body, hex‑encoded, prefixed with sha256= (header X‑Webhook‑Signature)
  retries: 'Up to 5 attempts with backoff: 1 min, 5 min, 30 min, 2 h, 24 h; after 15 consecutive failures the endpoint is auto‑disabled.'
docs: https://send16.com/docs/webhooks