weird issue with rDNS/PTR in Control panel

Hello,
I've installed cwp.admin yesterday on a VPS hosted at iniz.com.
In their control panel i've set the reverse dns to my machine's hostname (vps.naamareich.com)

for some reason i'm getting this:
Your Hostname is: vps.naamareich.com and it resolves to IP: naamareich.com. 185.53.129.160 [Check Black List]
rDNS/PTR = FAILED, check with your hosting provider! FAILED [Check SenderBase]

even tho in http://rdnslookup.com and http://mxtoolbox.com/ReverseLookup.aspx i get
PTR   185.53.129.160   vps.naamareich.com
Reported by rdns2.iniz.com on 1/28/2017 at 9:09:28 PM (UTC 0)

so why is cwp.admin showing me that error?

Hello,
I've installed cwp.admin yesterday on a VPS hosted at iniz.com.
In their control panel i've set the reverse dns to my machine's hostname (vps.naamareich.com)

for some reason i'm getting this:
Your Hostname is: vps.naamareich.com and it resolves to IP: naamareich.com. 185.53.129.160 [Check Black List]
rDNS/PTR = FAILED, check with your hosting provider! FAILED [Check SenderBase]

even tho in http://rdnslookup.com and http://mxtoolbox.com/ReverseLookup.aspx i get
PTR   185.53.129.160   vps.naamareich.com
Reported by rdns2.iniz.com on 1/28/2017 at 9:09:28 PM (UTC 0)

so why is cwp.admin showing me that error?

I think your domain does not have an MX record. Go to your control panel (domain admin, not CWP) and add an MX record, point to your mail server (ex: mail.yourdomain.com) and your IP.
You must also have an A record for mail.yourdomain.com (point to your server IP)