Name: gateway-mail/gatewayresponse.xml 
1:
<?xml version="1.0" encoding="UTF-8"?>
2:
<gatewayResponse xmlns="http://www.fp7-adventure.eu/xmlSchema/Gateways/">
3:
  <header>
4:
    <operationName>mail</operationName>
5:
    <commandResult>OK</commandResult>
6:
    <commandSequence>LAST</commandSequence>
7:
  </header>
8:
  <payload/>
9:
</gatewayResponse>