chnage const MX

kerioEmail_mx.php

@@ -8,7 +8,7 @@ require_once 'Net/DNS2.php';
 
 const NS1 = '185.163.51.130';
 const NS2 = '185.163.51.131';
-const MX  = 'mail1.thurdata.ch';
+const MX  = 'mail3.thurdata.ch';
 
 function KerioEmail_ClientAreaCustomButtonArray ($params)
 {