Email Marketing Integration with Popup Maker

Popup Maker version 1.7 exposes a public API to integrate our plugin with WordPress-compatible email marketing applications.  By making our API public, developers who support these 3rd party applications can build integrations between their plugin and Popup Maker. 

Applications that wish to register their Popup Maker extension with our plugin should consult the methods at '/Popup-Maker/classes/Newsletter/Providers.php'.  The API methods can be found in our plugin at:  '/Popup-Maker/classes/Abstract/Provider.php'.  

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