• PHP 8.4, with or without the IMAP extension which is no longer bundled with PHP.
• Mailtrap API integration.
• New interface for the master administration panel with night mode.
• Using the mailto option in the List-unsubscribe header is now optional.
• Several processes and scripts were optimized for faster sending.

For your users / clients

• News log app. Also known as changelog, roadmap, news chart or news bulletin. The news log can load as a sidebar widget inside your clients' websites with ready copy-paste code.
• Varying levels for admin email alerts. Your users can choose for which events to receive email alerts.
• Stripo & Unlayer custom image managers. This means that your users can now use their own assets folder just like with the standard WYSIWYG editor.
• Several charts improved.
• New API methods.
• Triggers received a significant update with many new options.
• See all new features in nuevoMailer ESP v.4.3 here