> For the complete documentation index, see [llms.txt](https://docs.emaildelivery.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emaildelivery.com/docs/integrations/event-webhooks.md). # Event webhooks {% hint style="info" %} Utilize webhooks to receive real-time event notifications to a third-party integration {% endhint %}
**New form submission**\ Triggers when a contact subscribes through a popup, slideout, hellobar, embedded, or 3rd party connected form. **Contact has been added to a list**\ Triggers when a contact is added to a list. **Contact has been tagged**\ Triggers when a tag is added to a contact. **Contact has been untagged**\ Triggers when a tag is removed from a contact. **Contact was sent a message**\ Triggers when a contact is sent a broadcast, funnel, or transactional message. **Contact opened a message**\ Triggers when a contact opens a message. **Contact clicked a link in a message**\ Triggers when a contact clicks a link in a message. **Contact unsubscribed**\ Triggers when contact has been unsubscribed. **Contact complained**\ Triggers when contact uses the "spam button" or "junk button" to signal they've received unwanted mail. **Contact soft-bounced**\ Triggers when contact bounces for temporary reasons such as exceeding their mailbox quota. **Contact hard-bounce**\ Triggers when retrying delivery to contact in the future will not succeed, usually because the email address doesn't exist. **Contact opened or clicked**\ Triggered by contact opening a message or clicking a link in a message - two triggers in one event. **Contact soft-bounced or hard-bounced**\ Triggered when contact is undeliverable for any reason - two triggers in one event. **Contact unsubscribed or complained**\ Triggered when contact has been unsubscribed or uses the "spam button" or "junk button" - two triggers in one event.