- Exchange Server non-delivery reports (NDRs) indicate email delivery issues. Causes can include non-existent, inactive or expired accounts, unresolved recipients, misspelled email addresses, SMTP problems, spam, poor spam filter configuration, a full BADMAIL folder, missing reverse DNS entries, and firewall interoperability issues -- just to name a few. Get tips on enabling and disabling NDRs, and learn how to decipher and troubleshoot NDR messages in this collection of expert advice.
Frequently Asked Questions:
EXCHANGE SERVER NON-DELIVERY REPORTS
How to designate NDR recipients
How to retrieve messages delivered to inactive accounts
NDR: 'You do not have permission to send to this recipient'
NDR: Message blocked because it contains a banned word
Spam filling up BADMAIL folder
Generating an NDR from a user's mailbox
Can I create a report/list of undeliverable email?
Can I modify NDRs in Exchange 2003?
User unable to send to a specific domain
Forward unknown recipient email to a special user
NDR errors with yahoo.com email
Configuring Exchange Server to send NDRs to external users
Troubleshooting 'undeliverable notifications'