update

src/main/java/au/com/royalpay/payment/manage/system/core/impl/MailGunServiceImpl.java

@@ -98,7 +98,7 @@ public class MailGunServiceImpl implements MailGunService {
             JSONObject var = new JSONObject();
             var.put("client_moniker", client.getString("client_moniker"));
             var.put("short_name", client.getString("short_name"));
-            result = mailGunClient.addListMember(client.getString("contact_email"), mailListDefault, client.getString("contact_person"), var);
+            result = mailGunClient.addListMember(client.getString("contact_email"), mailListDefault, client.getString("contact_person"),"", var);
         } catch (Exception ignore) {
             logger.info("add Mail List Failed email:" + client.getString("contact_email") + "  client_moniker:" + client.getString("client_moniker"));
         }