SBS 2008 will Not Send Server Reports to outside Email Address.

[Alex11H]

Hello. We have an SBS 2008 server that will not send emails to other address it just gives the error message " An error occured while sendining this report, As a result some of the Recpients will not Recive this email.

i have checked everything that i can think of and my users are able to email externally. how ever when i looked in the console log i saw the following error.

10972] 111020.121835.7648: AdminTME: Status: TaskId = TaskGenerateMonitoringReport, RootTaskId = TaskGenerateAndEmailReport, Success: True, Warning: False, Continue: True, Message:
[10972] 111020.121847.9503: Exception:
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An exception of type 'Type: System.Net.Mail.SmtpFailedRecipientException, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' has occurred.
Timestamp: 10/20/2011 12:18:47
Message: Mailbox unavailable. The server response was: 5.7.1 Unable to relay
Stack: at System.Net.Mail.SmtpClient.Send(MailMessage message)
at Microsoft.WindowsServerSolutions.SystemHealth.Monitoring.MailUtil.SendMail(String from, String[] to, String subject, Boolean isBodyHTML, String body, String inlineAttachmentPath, String[] attachments)

[10972] 111020.122041.8140: AdminTME: Status: TaskId = TaskEmailMonitoringReport, RootTaskId = TaskGenerateAndEmailReport, Success: False, Warning: False, Continue: False, Message:

[4792] 111020.122041.8140: AdminTME: Committer: Completed called
[4792] 111020.122041.8140: AdminTME: Committer: Task was cancelled.

[4792] 111020.122041.8296: AdminTME: Committer: Committer Completed.

we are using a smarthost of smtp.murphx.com
and the Ip of the Server in question is 192.68.2.254

Any help would be greatfully recived