v2.6.2

Changed

• The postman illustration moved to a banner on the FAQ tab (#37–#54), and the dark code blocks set the FAQ's PHP samples apart from the text.
• The plugin's images are PNG and GIF instead of SVG (#51).
• Admin pages split into router, actions and renderers (#37–#54). SmtpPage, SourcesPage and PluginPage shrank to routers; per-request static state resets through one RuntimeState::reset().
• PHPStan raised from level 5 to level 8, and from 1.12 to 2.1 (#37–#54), with the typing gaps it surfaced fixed.

Fixed

• Malformed email addresses are rejected in Settings (#37–#54). The alert recipient and the default sender now go through sanitize_email(), so they can no longer ship as a broken From:.
• The FAQ describes what the plugin actually changes (#37–#54). "Does this plugin change how emails are sent?" lists the opt-in features that do, and the caching-plugin answer points to the plugin's own cron setting first.