Zohomail bouncing back e-mails, while it is able to send one.

Zohomail bouncing back e-mails, while it is able to send one.

I setup an account which is sending mails but not receiving. Can anyone help .... ?
I got this ....
Delivery to the following recipient failed permanently:

      contact@mazdooriabhiyan.org

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain mazdooriabhiyan.org by us2.mx1.mailhostbox.com . [208.91.199.205].

The error that the other server returned was:
550-5.1.1 < contact@mazdooriabhiyan.org >: Recipient address rejected: User unknown in virtual alias table
550 5.1.1 Please see http://support.mailhostbox.com/email-administrators-guide/error-codes for explanation of the problem.


----- Original message -----

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d= gmail.com ; s=20120113;
        h=mime-version:in-reply-to:
references:date:message-id:subject:from:to
         :content-type;
        bh=ppqxzAmDNivA96cpqI83Y+akNVEoVy5ehQmilliRftY=;
        b=tQtOyN4aOEqJQ4iTLMeAP8y3VTprRZ3ztEnvEPihMe0G0yDsyEVqFEOD8johNF7HfF
         jRM10f5ZVABMWJyQLol5JXoaZ5yDi6ZUF+Ho7Re//XAWxAYeX1A9fjcsVgY3mQpsbdyP
         Xf403x+4/3/wpHVWgTgfZAqBFYC+ZNnaaaAAL2Nobr/aq4jot9hBjm3yPommdL9pXFHu
         jBoeFQe+aGp8UiyMrVbfseipcMABaLH0H3w4EJHdO7J7Ck54ch9aKVjL7kz5UMsyknNR
         oQ4r0bT1YNrSxQr/PeBToX296RHbcCm6LYqtDC9ry1pD5RU4zPh+BHjNFV0aLXt1pnBS
         ZH3A==
MIME-Version: 1.0
X-Received: by 10.60.63.39 with SMTP id d7mr17254920oes.72.1430284465555; Tue,
 28 Apr 2015 22:14:25 -0700 (PDT)
Received: by 10.76.125.103 with HTTP; Tue, 28 Apr 2015 22:14:25 -0700 (PDT)
Received: by 10.76.125.103 with HTTP; Tue, 28 Apr 2015 22:14:25 -0700 (PDT)
In-Reply-To: < 14d03981799.10d48d6b5185308.3392902696529359337@mazdooriabhiyan.org>
References: < 14d03981799.10d48d6b5185308.3392902696529359337@mazdooriabhiyan.org>
Date: Wed, 29 Apr 2015 10:44:25 +0530
Message-ID: < CAK9mdcsAUuGOLfUKP6A+AcTN-UBi1PxQHH_skddN1EsBdtcP9A@mail.gmail.com>
Subject: Re: test
From: Sanjay Sharma < sanjay.in.delhi@gmail.com>
To: Sanjay Sharma < contact@mazdooriabhiyan.org>
Content-Type: multipart/alternative; boundary=001a11c21ff07f4f060514d60de0