Not receiving emails: mail delivery

Not receiving emails: mail delivery

I can not receive any email.
When I try to send an email to ...@kijzer.be, I get a maildelivery failure.
It's strange because it has always worked and the dns records are already changed to zoho.

I also get this:
mx3.zoho.com   Failed To Connect
mx.zoho.com   Reverse DNS does not match SMTP Banner
mx2.zoho.com   Reverse DNS does not match SMTP Banner

Here you can find the mail I get:

< linda@kijzer.be>: host mx.zoho.com[216.52.72.121] said: 554 5.2.3 MailPolicy
   violation Error delivering to mailboxes (in reply to end of DATA command)

< peter@kijzer.be>: host mx.zoho.com[216.52.72.121] said: 554 5.2.3 MailPolicy
   violation Error delivering to mailboxes (in reply to end of DATA command)
Reporting-MTA: dns; smtp-relay.nucleus.be
X-Postfix-Queue-ID: 2C47C160E54
X-Postfix-Sender: rfc822; yannick@webit.be
Arrival-Date: Fri,  3 Feb 2017 09:52:58 +0100 (CET)

Final-Recipient: rfc822; linda@kijzer.be
Original-Recipient: rfc822; linda@kijzer.be
Action: failed
Status: 5.2.3
Remote-MTA: dns; mx.zoho.com
Diagnostic-Code: smtp; 554 5.2.3 MailPolicy violation Error delivering to
   mailboxes

Final-Recipient: rfc822; peter@kijzer.be
Original-Recipient: rfc822; peter@kijzer.be
Action: failed
Status: 5.2.3
Remote-MTA: dns; mx.zoho.com
Diagnostic-Code: smtp; 554 5.2.3 MailPolicy violation Error delivering to
   mailboxes
Return-Path: < yannick@webit.be>
Received: from localhost (unknown [127.0.0.1])
    by smtp-relay.nucleus.be (Postfix) with ESMTP id 2C47C160E54;
    Fri,  3 Feb 2017 08:52:58 +0000 (UTC)
X-Virus-Scanned: amavisd-new at example.com
Received: from smtp-relay.nucleus.be ([127.0.0.1])
    by localhost (smtp-relay.nucleus.be [127.0.0.1]) (amavisd-new, port 10027)
    with ESMTP id x1UDobs4TPNo; Fri,  3 Feb 2017 09:52:54 +0100 (CET)
Received: from dcs01.webit.be (www.webit.be [188.93.153.187])
    by smtp-relay.nucleus.be (Postfix) with ESMTP id A8BB0160C34;
    Fri,  3 Feb 2017 09:52:51 +0100 (CET)
Received: from d54c46d13.access.telenet.be ([84.196.109.19] helo=[192.168.0.190])
    by dcs01.webit.be with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256)
    (Exim 4.84)
    (envelope-from < yannick@webit.be>)
    id 1cZZbj-0001CU-6V; Fri, 03 Feb 2017 09:52:49 +0100
From: Yannick Van Gael < yannick@webit.be>
Content-Type: multipart/alternative;
boundary="Apple-Mail=_47D193FA-20E1-4AEB-B2AA-4ACB962632D8"
Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\))
Subject: Fwd: Salesmap Aangevuld
Message-Id: < 80FE15BB-B225-409B-8225-BBE76172F1AD@webit.be>
References: < A382AC82-BAD4-4EB7-A8A9-72A382F21D9D@webit.be>
To: Peter Nevelsteen < peter@kijzer.be>,
Linda Hens < linda@kijzer.be>
Date: Fri, 3 Feb 2017 09:52:37 +0100
X-Mailer: Apple Mail (2.3259)