> Webhook: An HTTP request a service sends to a URL you choose when something happens, so you don't have to keep asking.

Source: https://vaartix.com/glossary/webhook

[Email glossary](https://vaartix.com/glossary)

# Webhook

Email glossary

An HTTP request a service sends to a URL you choose when something happens, so you don't have to keep asking.

## How this affects you

Vaartix sends a signed webhook when an email is sent, delivered, delayed, bounced, marked as spam, rejected or suppressed. Verify the signature before trusting the request, and return a 2xx quickly. Failed deliveries are retried for about 24 hours, and an endpoint that keeps failing is turned off.

## Learn more

-   [Receive webhooks](https://vaartix.com/docs/webhooks/setup/)
-   [Verify signatures](https://vaartix.com/docs/webhooks/verify/)

Related: [Idempotency key](https://vaartix.com/glossary/idempotency-key) · [Bounce (hard and soft)](https://vaartix.com/glossary/bounce)

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