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Email issues



I currently having this issue. I bought domain ( and hosting here in GoDaddy. After that Ive parked to domains ( and


After creating emails with different domains. Im only currently having issues with the domain. It seems that something is wrong, using webmail I can send emails from email to (For example: gmail) emails . But when I reply from Gmail or any other email provider to my email I get this error:

This is the mail system at host

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                  The mail system

<>: unable to look up host
   Name or service not known
Reporting-MTA: dns;
X-Postfix-Queue-ID: 5ACCB180AFDF8
X-Postfix-Sender: rfc822;
Arrival-Date: Sun,  3 Jun 2018 18:24:00 +0000 (UTC)

Final-Recipient: rfc822;
Original-Recipient: rfc822;
Action: failed
Status: 5.4.4
Diagnostic-Code: X-Postfix; unable to look up host Name
   or service not known
Return-Path: <>
Received: from ( [])
by (Postfix) with ESMTP id 5ACCB180AFDF8
for <>; Sun,  3 Jun 2018 18:24:00 +0000 (UTC)
Received: from ( [])
by (Postfix) with ESMTP id 3B05818028ED1;



Ive deleted, the parked domain (, deleted email accounts... and doing everything all over again, but I still cant send emails to emails accounts.



Thank you everyone !