* new: Test the Email Quality with the built in Pre-check Feature.
* new: Tag you subscriber with Tags fro better segmentation.
* new: Improved security with a dedicate security settings page.
* new: Automatic batch size settings to calculate your optimal sending rate.
* new: Option to create new campaigns on action hook based auto responders.
* new: Updated add ons page to browse and install even more integrations.
* new: Updated templates page now lists over 400 free and premium templates.
* new: UI update with new icons based on SVG.
* new: Auto click prevention to prevent bots auto clicking and messing up your stats.
* new: Sending warmup if you send from a new IP address or domain.
* improved: db handling by splitting the actions table into five separate ones.
* improved: added primary keys to these tables: queue, subscriber_meta, subscriber_fields.
* improved: calculation of user rating has been offloaded as it's often server intense.
* improved: changes to tracking for the Apple Privacy Protection plans.
* improved: change on the random handler for random posts.
* added: new dynamic tag for button labels `{post_button:-1}`.
* added: indexes to campaigns to distinguish if multiple ones are sent (like birthday greetings).
* removed: auto update option to prefer native solution.
* removed: deprecated `mymail` hooks and filters.
