Hi all, In an Exchange 2003SP2 environment with Outlook 2003 clients i am getting a lot of NDRs in the postmaster mailbox generally for appointments/meeting responses that looks like the example below:
*NDR*: Your message To: MACHE MAC ; Subject: Accepted: Updated: Videoconférence Sent: Fri, 8 Apr 2011 12:43:41 +0200 did not reach the following recipient(s): MACHE MAC on Fri, 8 Apr 2011 12:43:41 +0200 The message could not be delivered because the recipient's destination email system is unknown or invalid. Please check the address and try again, or contact your system administrator to verify connectivity to the email system of the recipient. <BEL-EX1.acme.com #5.1.2> *NDR DETAILS*: Original-Envelope-ID: c=UK;a=RMV;p=ACME;l=BEL-EX1-110408104341Z-16560 Reporting-MTA: dns; bel-exmp1.acme.com Final-Recipient: RFC822; IMCEAEX-_O=ACME_OU=CLUSTER_CN=RECIPIENTS_CN= ma...@acme.com Action: failed Status: 5.1.2 X-Supplementary-Info: <BEL-EX1.acme.com #5.1.2> X-Display-Name: MACHE MAC After googling around i found that adding a X500 address could solve the issue. We are talking here about a user who's been migrated from one forest to another, we added the X500 address as it was before the migration....no luck. 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