i just blocked them from sending to all of ZOL's email servers for that same reason!
From the email headers
Received: from vps.ads.axa.co.zw (ads.axa.co.zw [220.127.116.11]) by rs15.zol.co.zw (8.14.4/8.13.8) with ESMTP id t1PB7LLZ011269 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 25 Feb 2015 13:07:23 +0200
Received: from localhost ([::1]:42320 helo=vps.ads.axa.co.zw) by vps.ads.axa.co.zw with esmtp (Exim 4.82) (envelope-from <email@example.com>) id 1YQZnT-0003GG-IT; Wed, 25 Feb 2015 13:06:31 +0200
i blocked the 18.104.22.168 IP