[Web][Postfix] Add mail policies: per-recipient send/receive rules for mailboxes and groups

data/conf/rspamd/dynmaps/mailpolicy.php

@@ -0,0 +1,39 @@
+<?php
+// Mail policy check for one recipient, asked by the Postfix policy service (mailcow-policy in master.cf)
+// Request: POST with the attributes of the Postfix policy request; answer: the action (DUNNO or the rejection)
+header('Content-Type: text/plain');
+require_once "vars.inc.php";
+require_once __DIR__ . '/../web/inc/lib/vendor/autoload.php';
+// Do not show errors, we log to using error_log
+ini_set('error_reporting', 0);
+// Init database
+$dsn = $database_type . ":unix_socket=" . $database_sock . ";dbname=" . $database_name;
+$opt = [
+    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+    PDO::ATTR_EMULATE_PREPARES   => false,
+];
+try {
+  $pdo = new PDO($dsn, $database_user, $database_pass, $opt);
+}
+catch (PDOException $e) {
+  error_log("MAILPOLICY: " . $e . PHP_EOL);
+  http_response_code(501);
+  exit;
+}
+
+if (!isset($_POST['request']) || $_POST['request'] !== 'smtpd_access_policy') {
+  http_response_code(400);
+  exit;
+}
+$value = fn(string $key): string => is_string($_POST[$key] ?? null) ? $_POST[$key] : '';
+
+try {
+  $policy = \Mailcow\MailPolicy\MailPolicyModule::create($pdo, \Mailcow\Core\Context::system());
+  echo $policy->api->check($value('sender'), $value('recipient'), $value('sasl_username'), (int)$value('server_port'));
+}
+catch (Throwable $e) {
+  // the policy service answers with a temporary error
+  error_log("MAILPOLICY: " . $e->getMessage() . PHP_EOL);
+  http_response_code(500);
+}