Mailbutler ( has announced a “major” update to the Tracking Details feature of their Apple Mail plug-in and Gmail extension. 

The utility brings missing functionalities of emailing back to the user’s inbox with tools such as snooze, send later, templates, signatures, tracking, and more. The latest version brings improved Email Tracking, introduces new Open and Reply Insights to help users plan, track and optimize email communication without leaving their inbox.

Mailbutler is available as a Mail plug-in on the macOS App store and Chrome extension for Gmail on Chrome Web Store. There’s a free plan that allows up to 30 actions, followed by paid versions with more features.