* new: Remove inactive Subscribers automatically

* new: Relative conditions for date fields

* new: filters in the subscriber overview

* updated: Manage Subscribers page

* fixed: add trailing space to preheaders to prevent unintentional line breaks in previews.

* fixed: saving template from editor messed up template header

* fixed: bulk deletion with actions working again

* fixed: auto responder no longer triggered if post is published in the past

* fixed: shortcodes are now handled properly on the web version

* added: text strings for error messages defined by the security settings page

* improved: ajax handler

* fixed: timeframe settings spanning over midnight

* fixed: layout issue on form/lists overview on smaller screens

* fixed: missing dbstructure method on queue process

* added: option to block and allow people from certain countries to signup

* update: using `get_user_local()` instead of `get_locale()` when applicable.

* fixed: bulk options causes a subscriber query error.

* fixed: duplicating forms throw an error.

* fixed: some notifications missed template defined settings.

* change: optional warmup has been extended to 60 days.

* improved: database errors during cron tried to get fixed automatically.

* added: reminder to enable auto updates after a Mailster update.

* added: editing templates on the templates page is back

* fixed: mergetags now work correctly in image URL field if fallback is present

* fixed: draft campaigns can now get duplicated

* fixed: install plugins on addon page is working

* fixed: problem if PHPMailer is loaded in another plugin

* fixed: installed templates were not access able when no required Mailster version was set

* improved upgrade process from 2.4.x

* smaller bug fixes

* 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.