Event ID - 9014

Event Id9014
DescriptionA message from an anonymous sender could not be delivered to smtp:Administrator@contoso.com because the recipient is configured to accept mails from authenticated senders only. (Message-ID: <AC03EFB87D21D34CA093F3BEA115A0C90BDA@server.contoso.com>). A DSN will be generated. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Event InformationAccording to Microsoft:
To turn on maximum logging of the MSExchangeTransport event source, follow these steps:
1. In Exchange System Manager, expand Servers, right-click the Exchange computer name where you want to configure logging, and then click Properties.
2. Click the Diagnostics Logging tab.
3. In the Services pane, click MSExchangeTransport.
4. In the Categories pane, click a category, and then click Maximum.
5. Repeat step 4 for each category.
6. Click OK when you are finished.
Reference LinksHow to restrict the users who can send inbound Internet e-mail to another user or to a distribution group in Exchange 2003

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