diff --git a/www/pages/ticket.php b/www/pages/ticket.php
index b4b51263..b16c8d6c 100644
--- a/www/pages/ticket.php
+++ b/www/pages/ticket.php
@@ -776,12 +776,12 @@ class Ticket {
             // Attachments
             $files = $this->app->erp->GetDateiSubjektObjektDateiname('Anhang','Ticket',$drafted_messages[0]['id'],"");
 
-            $pattern = '/[a-z0-9_\-\+\.]+@[a-z0-9\-]+\.([a-z]{2,4})(?:\.[a-z]{2})?/i';
+            $pattern = '/[a-z0-9_\-\+\.]+@[a-z0-9\-]+\.([a-z]{2,63})(?:\.[a-z]{2})?/i';
+
             preg_match_all($pattern, $drafted_messages[0]['mail'], $matches);
             $to = $matches[0];
 
             if ($drafted_messages[0]['mail_cc'] != '') {
-              $pattern = '/[a-z0-9_\-\+\.]+@[a-z0-9\-]+\.([a-z]{2,4})(?:\.[a-z]{2})?/i';
               preg_match_all($pattern, $drafted_messages[0]['mail_cc'], $matches);
               $cc = $matches[0];
             } else {