Client of mine tried to send an email to someone and got this bounce back. I am able to send emails from a different domain to this person. NDR is below.

Delivery has failed to these recipients or distribution lists:

email2 An error occurred while trying to deliver this message to the recipient's e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator.

The following organization rejected your message: Requested.

Sent by Microsoft Exchange Server 2007

Diagnostic information for administrators:

Generating server: local

email2 Requested #550 Requested action not taken: mailbox unavailable ##

Original message headers:

Received: from local ([IP]) by

 local ([IP]) with mapi; Mon, 4 May 2015

 16:15:12 -0300

From: email1 <email1>

To: "email2" <email2>

Date: Mon, 4 May 2015 16:15:11 -0300

Subject: Test

Thread-Topic: Test

Thread-Index: AdCGnqG7Z0yHeIW7TOiKidfR/nR4cw==

Message-ID: <ID@Local>

Accept-Language: en-US

Content-Language: en-US

X-MS-Has-Attach: yes

X-MS-TNEF-Correlator:

acceptlanguage: en-US

x-tm-as-product-ver: SMEX-10.1.0.1137-6.800.1017-18790.000

x-tm-as-result: Yes-11.878200-5.000000-31

x-tm-as-user-approved-sender: No

x-tm-as-user-blocked-sender: No

Content-Type: multipart/related;

        boundary="_007_B7C5B627E87C9244879ACEC3CDC584922EF6EB52B6KEIZERSERVERk_";

        type="multipart/alternative"

MIME-Version: 1.0

• Edited by JDrew85 15 hours 9 minutes ago sensitive info

Thanks for sharing.