DOCUMENT:Q295734 06-AUG-2002 [iis] TITLE :XCON: NDR When SMTP Messages Are Relayed to a Domino Server PRODUCT :Internet Information Server PROD/VER::4.0,5.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server versions 4.0, 5.0 - Microsoft Exchange 2000 Server - Microsoft Exchange 2000 Enterprise Server ------------------------------------------------------------------------------- SYMPTOMS ======== When the Internet Information Server (IIS) Simple Mail Transfer Protocol (SMTP) service is configured to relay SMTP messages to a Lotus Domino R5.x server, the message originator may receive a non-delivery report (NDR) that is similar to the following message: This is an automatically generated Delivery Status Notification. Delivery to the following recipients failed. @.com CAUSE ===== This issue can occur if the Domino server has not been configured to support 8-bit MIME-formatted messages. When the SMTP service receives an 8-bit MIME-formatted message that needs to be routed to a Domino server, the SMTP service initiates an SMTP connection to the Domino server. After the SMTP service sends an EHLO command, Domino responds with its list of supported ESMTP verbs. If "8BITMIME" is not included in the list of support verbs, the SMTP service cannot deliver the message to the Domino recipient because Domino has not been configured to understand the message format. The SMTP service then sends the RSET command to Domino to reset the SMTP connection. Finally, the SMTP service sends an NDR to the original sender. To view the SMTP commands that are sent, use a network packet analyzer, such as Microsoft Network Monitor. RESOLUTION ========== Top resolve this issue: 1. On the Domino server, open the server's Configuration Document. 2. Click the Router/SMTP tab, and then click the Advanced tab. The ESMTP verbs that can be enabled are displayed in the "Commands and Extensions" section; one of the verbs is "8BITMIME". MORE INFORMATION ================ To check to see if the Domino server supports a certain extension, telnet to port 25 of the Domino server, and then type "EHLO domain.com" (without the quotation marks). You can perform the same telnet procedure against the SMTP service to see a larger set of supported MIME types. The SMTP service cannot down-convert an 8-bit MIME message to 7-bit. Additional query words: smtpsvc ====================================================================== Keywords : Technology : kbiisSearch kbExchangeSearch kbiis500 kbiis400 kbExchange2000Search kbExchange2000Serv kbExchange2000EntServ Version : :4.0,5.0 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.