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Exchange 2010 - #550 5.7.1 Unable to relay#

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Hello,

When I try to send mail out, I get the following message:

Delivery has failed to these recipients or groups:

'user@comcast.net' (user@comcast.net) (user@comcast.net) Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept e-mail from certain senders, or another restriction may be preventing delivery.

The following organization rejected your message: SERVER0.Domain.local.

Diagnostic information for administrators:

Generating server: SERVER1.Domain.local

user@comcast.net SERVER0.Domain.local #550 5.7.1 Unable to relay ##

Original message headers:

Received: from SERVER0.Domain.local ([192.168.217.10]) by  SERVER1.Domain.local ([192.168.217.11]) with mapi id 14.02.0342.003;  Wed, 15 May 2013 21:43:13 -0400 From:"Donald S. Doyle" <dsdoyle@domain.com> To: "'user@comcast.net' (user@comcast.net)" <user@comcast.net> Subject: TEST @ 2143 Thread-Topic: TEST @ 2143 Thread-Index: Ac5R1rhdfK/ch7rsS6KjygWUhCt+9g== Date: Thu, 16 May 2013 01:43:11 +0000 Message-ID: <E3336DF928658B45AD4B60C756612AD533E204@SERVER0> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [68.58.136.101] Content-Type: multipart/alternative;             boundary="_000_E3336DF928658B45AD4B60C756612AD533E204SERVER0_" MIME-Version: 1.0

I have a send connector "*" with Smart Host Authentication set to None.

Thank you for your time,

Don


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