add mail forwarding

app/Enums/Zimbra.php

@@ -95,7 +95,7 @@ class Zimbra
         'zimbraFeaturePeopleSearchEnabled',
         'zimbraFeatureSMIMEEnabled',
         'zimbraFeatureEwsEnabled',
-//        'zimbraPrefMailForwardingAddress',
+        'zimbraPrefMailForwardingAddress',
         'zimbraPrefMailLocalDeliveryDisabled'
     ];