Signed External Webhooks — Integration

Overview

Deliver configured Email Hub webhook events to approved HTTPS destinations through a durable delivery queue with signing, retries, status, and network-destination validation.

Capabilities

• Webhook configuration and delivery records

• Durable webhook dispatch worker running every minute

• HMAC signing material stored through application-secret handling

• HTTPS destination validation and public-address policy checks

• Delivery attempts, status, response metadata, and retry state

1. 1

   Step 1

   Configure the webhook destination and signing secret reference.

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2. 2

   Step 2

   Select or persist the Email Hub event/configuration that should produce webhook work.

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3. 3

   Step 3

   MailBridge records a delivery and the webhook worker dispatches it to the validated destination.

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4. 4

   Step 4

   Verify the signature and delivery metadata at the receiving endpoint.

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Limitations

• Webhook destinations must satisfy Email Hub external-network policy and use the configured secure transport requirements.

• Delivery state is durable so attempts and outcomes remain visible to the application.

FAQs

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