http://blogs.technet.com/b/exchangept/archive/2008/10/14/standard-ndr-codes-table-and-troubleshooting.aspxNDR status codes and corresponding error conditions NDR status code Event log message ID Event log message severity Event log message text Possible cause Troubleshooting 4.3.1 3001 Error A non-delivery report with a status code of %1 was generated foren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/exchangept/archive/2008/10/14/standard-ndr-codes-table-and-troubleshooting.aspx#3174487Mon, 29 Dec 2008 23:05:26 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3174487Helga L<p>I just got a 5.9.4 NDR code. &nbsp;I can't seem to find what it means. &nbsp;It came in an email with 2 attachments that I can't open due to not knowing what to open them with and I don't even know if it's safe to open them anyway even though my virus scanner didn't stop it. &nbsp;The email was sent from my email address to my email address and the subject line is: &quot;Non delivery report: 5.9.4 (Spam SLS/RBL)&quot;. &nbsp;The attachemnts are both called: &nbsp;&quot;Non Deliver Report_9.5.4(SPAM SLS_RBL).dat&quot; but one has 711 bytes and the other has only 707. &nbsp;Any ideas on how to figure out what is not getting delivered and why?</p><div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3174487" width="1" height="1">http://blogs.technet.com/b/exchangept/archive/2008/10/14/standard-ndr-codes-table-and-troubleshooting.aspx#3138064Fri, 17 Oct 2008 20:37:40 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3138064subject: exchange<p>How to Publish Microsoft Exchange Active Sync (EAS) with ISA Server 2006 (Part 1) How to troubleshoot</p><img src="http://blogs.technet.com/aggbug.aspx?PostID=3138064" width="1" height="1">