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What happens when email is sent to a non-existent user?
Exchange Server expert David Sengupta explains what happens to email that is sent to a non-existent user.
What happens when email is sent to a non-existent user?
Good question. It ends up being issued in an Exchange Server non-delivery report (NDR), but what specifically happens to the message depends on your particular configuration. See Microsoft Knowledge Base Article 315631 "
How to forward mail with unresolved recipients to a single mailbox" for details.
Expert Advice: Create a 'catch-all' box to receive improperly addressed email
Tip: Dealing with undeliverable messages in Exchange Server
FAQ: Exchange Server non-delivery reports
Reference Center: Exchange non-delivery reports tips and resources
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