A webhook is an HTTP/HTTPS call that your WordPress blog makes to an external system when something happens. The Newsletter plugin can signal to external systems these events:
someone subscribes
some cancel the subscription
a newsletter is sent (on completion)
Elegant Themes Nexus
Beaver Builder Theme
Beaver Themer
Multiple Addresses for WooCommerce Pro By ThemeHigh
Heroic Knowledge Base Plugin by HeroThemes
iThemes DisplayBuddy Slideshow
MicroThemer WordPress CSS Editor
Download Manager Pro Form Lock Add-on
FooGallery PRO Expert
WooMail WooCommerce Email Customizer
WordPress Events Calendar Registration and Tickets
Real Estate Manager Pro - WordPress Plugin
JetThemeCore For Elementor
BuddyPress User Profile Tabs Creator Pro 

