feat: implement global autoresponder plugin

2026-06-02 19:19:00 +02:00
commit 6f989af278
62 changed files with 2018 additions and 0 deletions
@@ -0,0 +1,31 @@
+<?php
+declare(strict_types=1);
+
+final class MessageClassifier
+{
+    /** @param array<string,string> $headers */
+    public static function shouldSuppress(array $headers, string $sender): bool
+    {
+        $sender = strtolower(trim($sender));
+        if ($sender === '' || str_starts_with($sender, 'mailer-daemon') || str_starts_with($sender, 'postmaster')) {
+            return true;
+        }
+        $normalized = [];
+        foreach ($headers as $key => $value) {
+            $normalized[strtolower(trim($key))] = strtolower(trim($value));
+        }
+        if (($normalized['auto-submitted'] ?? 'no') !== 'no') {
+            return true;
+        }
+        if (in_array($normalized['precedence'] ?? '', ['bulk', 'list', 'junk'], true)) {
+            return true;
+        }
+        if (($normalized['list-id'] ?? '') !== '') {
+            return true;
+        }
+        if (str_contains($normalized['content-type'] ?? '', 'delivery-status')) {
+            return true;
+        }
+        return false;
+    }
+}