From 6710827b8163ff3edea3114bb4a6b611cfd4c1d7 Mon Sep 17 00:00:00 2001
From: boban <boban.blaskovic@gmail.com>
Date: Mon, 27 Apr 2026 20:09:03 +0200
Subject: [PATCH] Fix: Postfix myhostname + /etc/aliases beim Domain-Speichern
 automatisch aktualisieren

---
 app/Livewire/Ui/System/SettingsForm.php | 36 +++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/app/Livewire/Ui/System/SettingsForm.php b/app/Livewire/Ui/System/SettingsForm.php
index fb6ec1a..c1c7959 100644
--- a/app/Livewire/Ui/System/SettingsForm.php
+++ b/app/Livewire/Ui/System/SettingsForm.php
@@ -229,6 +229,10 @@ class SettingsForm extends Component
             $warnings[] = 'System-Domain: ' . $sysmailErr;
         }
 
+        if ($this->mail_domain) {
+            $this->applyPostfixHostname($this->mail_domain);
+        }
+
         $this->loadSslStatus();
 
         if ($warnings) {
@@ -498,6 +502,38 @@ class SettingsForm extends Component
         file_put_contents($path, $content);
     }
 
+    private function applyPostfixHostname(string $mailHost): void
+    {
+        $safeHost = preg_replace('/[^a-zA-Z0-9.\-]/', '', $mailHost);
+        if (!$safeHost) return;
+
+        $destination = "{$safeHost}, localhost.localdomain, localhost";
+
+        @shell_exec('sudo -n /usr/sbin/postconf -e ' . escapeshellarg("myhostname={$safeHost}") . ' 2>/dev/null');
+        @shell_exec('sudo -n /usr/sbin/postconf -e ' . escapeshellarg("myorigin={$safeHost}") . ' 2>/dev/null');
+        @shell_exec('sudo -n /usr/sbin/postconf -e ' . escapeshellarg("mydestination={$destination}") . ' 2>/dev/null');
+        @shell_exec('sudo -n /usr/sbin/postfix reload 2>/dev/null');
+
+        // root-Alias → /dev/null verhindert Bounce-Schleife bei System-Mails von www-data
+        $this->sudoTee('/etc/aliases', "# Managed by Mailwolt\npostmaster: root\nroot: /dev/null\nclamav: /dev/null\n");
+        @shell_exec('sudo -n /usr/bin/newaliases 2>/dev/null');
+    }
+
+    private function sudoTee(string $target, string $content): void
+    {
+        $proc = proc_open(
+            sprintf('sudo -n /usr/bin/tee %s >/dev/null', escapeshellarg($target)),
+            [0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'w']],
+            $pipes
+        );
+        if (!is_resource($proc)) return;
+        fwrite($pipes[0], $content);
+        fclose($pipes[0]);
+        stream_get_contents($pipes[1]);
+        stream_get_contents($pipes[2]);
+        proc_close($proc);
+    }
+
     public function render()
     {
         if (!in_array($this->tab, self::VALID_TABS, true)) {