All of the major ESPs will send a webhook back with the stats.

This is a basic feature that has been requested many times:https://ideas.gohighlevel.com/ideas/HIGHLVL-I-61https://ideas.gohighlevel.com/ideas/HIGHLVL-I-1927https://ideas.gohighlevel.com/ideas/HIGHLVL-I-5743https://ideas.gohighlevel.com/ideas/HIGHLVL-I-1319https://ideas.gohighlevel.com/ideas/HIGHLVL-I-1658https://ideas.gohighlevel.com/ideas/HIGHLVL-I-4316https://ideas.gohighlevel.com/ideas/HIGHLVL-I-404

And send the "email open" notifications to the mobile app as well..

Would be great to have all these stats from Mailgun ported across into a HL reporting dashboard.

Mailgun tracks all of the typical events that occur with emails:

Opens

Link clicks

Bounces

Unsubscribes

Spam complaints

We make that data available to you via the Control Panel or through the API.

In addition, you can set up webhooks and we will post events to your URL. Take a look at our tracking documentation for more information.