Have you tried restarting the routing engine? Maybe the routing tables are hosed.
From: Al Rose [mailto:arose...@gmail.com] Sent: Monday, June 06, 2011 1:00 PM To: MS-Exchange Admin Issues Subject: Re: URGENT: You do not have permission to send to this recipient smtp;550 5.7.1 Unable to relay for These errors include internal emails indeed. I have checked the recipient policies and nothing changed, i can still see the domain name listed. Thank you On Mon, Jun 6, 2011 at 7:46 PM, Peter Johnson <peter.john...@peterstow.com<mailto:peter.john...@peterstow.com>> wrote: Exchange 2003? Do these errors include internal e-mails? Have you changed the recipient policy and perhaps inadvertently removed your internal domain? I've had this happen to a customer before in a past life :) Is the exchange system perhaps no longer authoritative for the internal domain name? Regards [Description: C:\Users\ptjohnson\AppData\Roaming\Microsoft\Signatures\peterstow logo2.jpg] Peter Johnson I.T Architect United Kingdom: +44 1285 658542 South Africa: +27 11 252 1100 Swaziland: +268 2442 7000 Fax:+27 11 974 7130 Mobile: +2783 306 0019 peter.john...@peterstow.com<mailto:peter.john...@peterstow.com> www.peterstow.com<http://www.peterstow.com> This email message (including attachments) contains information which may be confidential and/or legally privileged. Unless you are the intended recipient, you may not use, copy or disclose to anyone the message or any information contained in the message or from any attachments that were sent with this email, and If you have received this email message in error, please advise the sender by email, and delete the message. Unauthorised disclosure and/or use of information contained in this email may result in civil and criminal liability. Everything in this e-mail and attachments relating to the official business of Peterstow Aquapower is proprietary to the company. Caution should be observed in placing any reliance upon any information contained in this e-mail, which is not intended to be a representation or inducement to make any decision in relation to Peterstow Aquapower. Any decision taken based on the information provided in this e-mail, should only be made after consultation with appropriate legal, regulatory, tax, technical, business, investment, financial, and accounting advisors. Neither the sender of the e-mail, nor Peterstow Aquapower shall be liable to any party for any direct, indirect or consequential damages, including, without limitation, loss of profit, interruption of business or loss of information, data or software or otherwise. The e-mail address of the sender may not be used, copied, sold, disclosed or incorporated into any database or mailing list for spamming and/or other marketing purposes without the prior consent of Peterstow Aquapower. No warranties are created or implied that an employee of Peterstow Aquapower and/or a contractor of Peterstow Aquapower is authorized to create and send this e-mail. [Description: C:\Users\ptjohnson\AppData\Roaming\Microsoft\Signatures\environment2.jpg] From: Al Rose [mailto:arose...@gmail.com<mailto:arose...@gmail.com>] Sent: 06 June 2011 07:07 PM To: MS-Exchange Admin Issues Subject: Re: URGENT: You do not have permission to send to this recipient smtp;550 5.7.1 Unable to relay for We are indeed using a smart host, i contacted the admin for this one and they said everything is OK... I reverted back the relay settings to what they were. Relay Restrictions: Only the list below (empty list) Box checked Allow all computers which succesfully authenticate to relay Still NDRs To see i have disabled Antigen SMTP scan but no luck On Mon, Jun 6, 2011 at 6:11 PM, Simon Butler <si...@sembee.co.uk<mailto:si...@sembee.co.uk>> wrote: You don't have to touch relay settings at all if the client machines are all Outlook MAPI clients (instead of POP3/IMAP/SMTP). What server is generating the NDR? Are you using a smart host? If so, have you checked it is still able to relay email for your server? Simon. -- Simon Butler MVP: Exchange, MCSE Sembee Ltd. e: si...@sembee.co.uk<mailto:si...@sembee.co.uk> w: http://www.sembee.co.uk/ w: http://exchange.sembee.info/ w: http://blog.sembee.co.uk/ Need cheap certificates for Exchange, compatible with the iPhone? http://CertificatesForExchange.com/<http://certificatesforexchange.com/> for certificates from just $26.99. Need a domain for your certificate? http://DomainsForExchange.net/<http://domainsforexchange.net/> Exchange Resources: http://exbpa.com/ From: Al Rose [mailto:arose...@gmail.com<mailto:arose...@gmail.com>] Sent: 06 June 2011 15:34 To: MS-Exchange Admin Issues Subject: URGENT: You do not have permission to send to this recipient smtp;550 5.7.1 Unable to relay for Hi, Exchange 2003 SP2, clients Outlook 2003 All of a sudden all emails in our ORG generate NDRs: You do not have permission to send to this recipient smtp;550 5.7.1 Unable to relay for u...@acme.com<mailto:u...@acme.com> Havent touched config in Exchange, but tried to restart SMTP service on all front end servers and do the following fix: select your virtual smtp server and right click then options. if you have 2 virtual servers choose the one that connects to the outside. go to access tab and click on relay. choose "only that list" make sure you untick the autorize relay to autenticated computers check box. click on the users button and check both check boxes for authenticated users. 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