Show mailbox when creating alias for user who has full_mailbox enabled

app/dashboard/templates/dashboard/custom_alias.html

@@ -54,7 +54,7 @@
         </div>
       </div>
 
-      {% if mailboxes|length > 1 %}
+      {% if mailboxes|length > 1 or current_user.full_mailbox %}
         <div class="row mb-2">
           <div class="col p-1">
             <select class="form-control" name="mailbox">