>From the NDR you gets back obviously there's a server that is generating the NDR. Is it your server issuing the SMTP unable to relay response or is it an external server that is causing your server to generate the NDR? Message tracking / protocol logging can help you track down what IP address is issuing the SMTP response and why.
From: Al Rose [mailto:arose...@gmail.com] Sent: 06 June 2011 10:34 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 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. Any ideas? --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
