DNS lookup resulted in a loopback relay. This is not permitted and message has been returned. Please check recipient dom

[keepetouch]

MailEnable: Message could not be delivered to some recipients.
The following recipient(s) could not be reached:

Recipient: [SMTP:xxx@xxx.it]
Reason: DNS lookup resulted in a loopback relay. This is not permitted and message has been returned. Please check recipient domain.



Message contents follow:

Received: from COMPUTERNAME([XXX.XX.XXX.XXX]) by xxxxxxxxx.com with MailEnable ESMTP; Fri, 29 Sep 2017 17:09:00 +0200
Return-Receipt-To: "XXXXXXXXXXXXXXXXXXXXXXXXX" <xxx@xxxxxxxxx.com>
From: "XXXXXXXXXXXXXXXXXXXXX" <xxx@xxxxxxxxxx.com>
To: <xxx@xxxxxx.it>

_______________________________________________________________________________________________________________________

When I send an email to an address, after 5 minutes i receive a server message with written over message error. I show you up, and we did non understand the reason. It appear just up 2 days.
My ip server is not present in any blacklist.

Can you help me please??
Thank you

[tuoplanet.srl]

same error on 9.76 (pro) version.