MSExchangeTransport 1025

This article provides an explanation and possible resolutions for a specific Exchange event. If you don't find what you’re looking for here, try searching Exchange 2010 Help.

Details

Explanation

This Error event indicates a problem validating the e-mail address of a sender that was using "Send as" permission to send a message. The Active Directory directory service lookup for the address of the sender returned the specified validation errors.

The "Send as" permission allows recipients to send e-mail messages as if the message originated from a different recipient. Specifically, recipients who are granted the "Send as" permission to any mail-enabled object can enter the other recipient's name in the From field for the messages that they send.

For example, assume that Michelle has been granted "Send as" permissions for the mailbox of her manager, Laura. Michelle sends a message to Julia that has Laura's name in the From field. When Julia receives the message, the message appears to be sent by Laura.

For more information, see: Manage Send As Permissions for a Mailbox.

User Action

To resolve this error, do one or more of the following:

• Make sure that the Exchange server that logged this event can communicate with one or more Active Directory servers that are available in the organization.

• Verify that the specified recipient has the "Send as" permission granted to the specified mail-enabled object.

For More Information

If you are not already doing so, consider running the Exchange tools, which have been created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues and improve mail flow. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.