email SMTP error message

Hello,

When a new member sign up i receive this error message How can i fix it?

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

  admin@zawajalslami.com

    host cm.websitewelcome.com [192.185.178.233]

    SMTP error from remote mail server after RCPT TO:<admin@zawajalslami.com>:

    550 5.1.1 <admin@zawajalslami.com> recipient rejected

—— This is a copy of the message, including all the headers. ——

Return-path: <admin@zawajalislami.com>

Received: from [192.185.4.86] (port=35943 helo=zawajalislami.com)

                by gator4075.hostgator.com with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256)

                (Exim 4.85)

                (envelope-from <admin@zawajalislami.com>)

                id 1aEeks-000Lj9-5W

                for admin@zawajalslami.com; Thu, 31 Dec 2015 09:03:06 -0600

Date: Thu, 31 Dec 2015 15:03:06 +0000

To: admin@zawajalslami.com

From: Zawaj Al Islami <admin@zawajalislami.com>

Subject: [Zawaj Al Islami] New User Registration

Message-ID: <2eccf69f6515a467730a76e9f16348ad@zawajalislami.com>

X-Priority: 3

X-Mailer: PHPMailer 5.2.10 (https://github.com/PHPMailer/PHPMailer/)

MIME-Version: 1.0

Content-Type: multipart/alternative;

                boundary=”b1_2eccf69f6515a467730a76e9f16348ad”

Content-Transfer-Encoding: 8bit

This is a multi-part message in MIME format.

–b1_2eccf69f6515a467730a76e9f16348ad

Content-Type: text/plain; charset=us-ascii

New user registration on your site Zawaj Al Islami:

Username: chandinibanquet

Email: lycdubai@gmail.com

–b1_2eccf69f6515a467730a76e9f16348ad

Content-Type: text/html; charset=us-ascii

<p>New user registration on your site Zawaj Al Islami:</p>

<p>Username: chandinibanquet</p>

<p>Email: <a href=”mailto:lycdubai@gmail.com“>lycdubai@gmail.com</a></p>

–b1_2eccf69f6515a467730a76e9f16348ad–