Caldera form security

Hi,
After installing Cladera Forms 4.6, the very first message I receive seems to be SPAM: text is provocative, sender email is weird, message body contains many links.
I understand that this plugin has it’s own algorithm to prevent bots from writing, so I left “WordPress” selected as the mail delivery system.
Am I missing anything?
Is there anything I could do on my site to prevent this?
thanks a lot!
Please find hereafter the details of the mail received:
……..

Return-Path: <cristiano.plini@xxx.com.ar>
Delivered-To: cristiano.plini@presentardoc.com
Received: from wo02.xxx.com
	by wo02.wiroos.com with LMTP id cIFxBrc7bloOHwIAblW98g
	for <cristiano.plini@xxx.com>; Sun, 28 Jan 2018 18:08:07 -0300
Return-path: <cristiano.plini@xx.com.ar>
Envelope-to: cristiano@xxx.com
Delivery-date: Sun, 28 Jan 2018 18:08:07 -0300
Received: from csegnoco by wo02.xxx.com with local (Exim 4.89_1)
	(envelope-from <cristiano.plini@xxx.com.ar>)
	id 1efuBL-000aRr-1i
	for cristiano@xxx.com; Sun, 28 Jan 2018 18:08:07 -0300
To: cristiano@xxx.com
Subject: Footer contact form 2
X-PHP-Script: www.silviaaguirre.com.ar/index.php for 185.36.102.114
X-PHP-Filename: /home/csegnoco/public_html/silviaaguirre.com.ar/index.php REMOTE_ADDR: 185.36.102.114
Date: Sun, 28 Jan 2018 21:08:06 +0000
From: Caldera Forms Notification <cristiano@xxxx.com>
Message-ID: <591192f13a94adfebc6a2f8b109d4e83@www.silviaaguirre.com.ar>
X-Mailer: PHPMailer 5.2.22 (https://github.com/PHPMailer/PHPMailer)
MIME-Version: 1.0
Content-Type: text/html; charset=UTF-8

<p><strong>Contacto</strong></p>
<div style="margin-bottom:20px;">Encuentro que no sois derecho. Puedo demostrarlo. Escriban en PM, discutiremos.<br />
http://re-store.win/<br />
http://rnshop.top/<br />
http://ownshop.win/</p>
<p>http://senot.win/<br />
http://noreferer.win/</p>
<p>http://longviberi.tumblr.com/<br />
https://twitter.com/fadeevstepan</p>
</div>
<p><strong>Nombre</strong></p>
<div style="margin-bottom:20px;">pexiaPet</div>
<p><strong>e-mail</strong></p>
<div style="margin-bottom:20px;">pexiaPet@sengi.top</div>

• This topic was modified 8 years, 4 months ago by Steven Stern (sterndata).
• This topic was modified 8 years, 4 months ago by Steven Stern (sterndata).

The page I need help with: [log in to see the link]