'You do not have permission to send to this recipient' errors

Countless Exchange Server administrators have been faced with the 'You do not have permission to send to this recipient' non-delivery report (NDR) as a result of a 5.7.1 or 5.7.3 error. There are numerous potential causes for these errors, including firewall configuration issues, bad DNS settings, updating recipient policies, and blocked SMTP communication -- just to name a few. This Exchange Server Troubleshooting Guide will help you diagnose 'You do not have permission to send to this recipient' errors and resolve your email delivery dilemmas.

	Potential Cause   Firewalls
	If users are having problems sending email from Exchange Server, the firewall could be the culprit. Your checklist should include: firewall configurations and settings, personal firewalls installed on a client machine, and a change in the external IP address of the Microsoft Internet Security and Accleration (ISA) Server. More firewall troubleshooting tips:   Disable the Mailguard feature on your Cisco PIX firewall   Adjust firewall policies for less restrictive SMTP monitoring rules   Learn how to (properly) configure ISA Server as an SMTP filter

	Potential Cause   DNS and MX records
	A Mail Exchanger DNS record -- better known as an MX record -- helps an email message reach its intended recipient. You should analyze your public DNS record to make sure that the server's PTR (pointer) record has the server name mapped to the correct IP address. More DNS troubleshooting tips and tools:   A primer on DNS and MX records   Nslookup: Check the DNS record associated with your domain   End reverse DNS lookups   Reverse DNS lookup failure

	Potential Cause   SMTP authentication and relaying
	SMTP authentication and relaying may be affected by a blocked domain, spam filters not allowing country-code domains, attachments, and MSExchange Transport errors (check event logs for these errors). If the "Allow all computers which successfully authenticate to relay" checkbox is not ticked, this also may cause Exchange Server non-delivery errors. More SMTP authentication and relaying tips:   Stop relaying and enable outgoing SMTP authentication   Mail relay issues in Exchange Server 2003 and Exchange 2000 Server   Telnet to port 25 to test SMTP communication   Should you turn off your network's outbound SMTP (port 25)?   Testing IP restrictions on port 25

	Potential Cause   Internet Service Providers
	Your Internet Service Provider (ISP) or your recipient's ISP may be at the root of your email delivery woes. More on ISPs causing email delivery failure:   Problems sending email to free Internet email accounts   Many ISPs now blocking port 25

	Potential Cause   Recipient policies and permissions
	Proxy addresses should match at least one Exchange Server recipient policy. If you do not have an Exchange Server recipient policy configured for the domain to which the message is sent or the sender does not have permissions, you may receive a 5.7.1 error. More on configuring recipients and permissions:   How to effectively manage recipients and distribution lists

	Potential Cause   Spam filtering
	The intended recipient's spam filter may be identifying your Exchange Server email as unsolicited commercial email (UCE) or spam. More spam-filtering troubleshooting tips:   Message blocked because it contains a banned word   Fighting spam with SMTP 'tar pits'   Configuring the smart host setting for outbound mail on Exchange 2003   Exchange Intelligent Message Filter

Additional resources for diagnosing and troubleshooting NDRs:

Expert Advice: 'You do not have permission to send to this recipient'

FAQ: Exchange Server non-delivery reports

Discussion Forum: 'You do not have permission to send to this recipient'

Tip: Troubleshooting non-delivery reports

Tip: POP3 users cannot send mail outside the server

Tip: An introduction to Exchange Server diagnostic logging

Download: Investigate errant email with Exchange Message Tracking Center

Reference Center: Exchange Server NDR tips and resources

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