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Issue sending out external emails

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Hello,

I am having an issue sending out external emails. Here is some background information to give anyone who looks at this a better understanding of my setup.

1. This is a lab setup/test environment for educational purposes only.

2. Exchange 2013 - CAS and Mailbox Roles

3. Windows Server 2012 R2 (Exchange server, IIS 8) 192.168.21.7

Windows Server 2012 R2 (Hyper-V Host) 192.168.21.5

Windows Server 2012 R2 (P-AD.DC, DNS, DHCP, File Share) 192.168.21.6

4. All DNS Records are set to 192.168.21.6, 8.8.8.8

I have having an issue sending out external emails. I do not have a registered domain. I can send emails internally just fine. Externally I get this message:

Diagnostic information for administrators:

Generating server: LAB-EXCH01.LAB.local

jeff@xxxx.net
LAB-EXCH01.LAB.local #550 5.7.1 Unable to relay
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Original message headers:

Received: from LAB-EXCH01.LAB.local (192.168.21.7) by LAB-EXCH01.LAB.local (192.168.21.7) with Microsoft SMTP Server (TLS) id 15.0.516.32; Wed, 1 Jul 2015 08:12:07 -0500 Received: from LAB-EXCH01.LAB.local ([fe80::c548:af7a:daed:xxxx]) by LAB-EXCH01.LAB.local ([fe80::c548:af7a:daed:xxxxx]) with mapi id 15.00.0516.029; Wed, 1 Jul 2015 08:12:07 -0500 From: Jeffrey <JEFF@lab.local> To: "jeff@xxxx.net" <jeff@xxxxx.net> Subject: test Thread-Topic: test Thread-Index: AQHQs/+FRlO3GUcXlkSB0RliYPjFxg== Date: Wed, 1 Jul 2015 13:12:07 +0000 Message-ID: <aab65014724f47bbb634fd0998fad498@LAB-EXCH01.LAB.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [50.192.xx.xx] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0

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I have a Frontend Receive Connector Relay setup, with Anonymous users checked. I was told I could send out emails with a local domain but could not receive them.

After setting up the relay, I would get a different error on occasions stating I did not have Authentication. Then my local emails wouldn't work.

Any help would be much appreciated.


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