DOCUMENT:Q100705 28-OCT-1999 [pcmail] TITLE :SMTP: Err Msg: 550 Addressee Unknown PRODUCT :Microsoft Mail For PC Networks PROD/VER:MS-DOS:2.1,3.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Mail Gateway to SMTP, versions 2.1, 3.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Versions 2.1 and 3.0 of Microsoft Mail Gateway to SMTP may display this error message: 550 Address Unknown CAUSE ===== Thisindicates that the SMTP Gateway was unable to identify the recipient of the incoming message. This error message may occur if: - The recipient name of the address is not a valid Microsoft Mail user name. -or- - The domain name of the address not in the gateway's address map. Ensure the recipient is a valid Microsoft Mail for PC Networks user name, and that the domain name received is in the address map table. You can modify or add entries to the address map in the Admin program (Gateway, SMTP, Address Map) to match the domain name being received. Please refer to Microsoft Application Note "Configuring the SMTP Gateway and Domain Name Service (DNS)" and the version 3.0 "Microsoft Mail Gateway to SMTP Administrator's Guide," pages 34-40, for additional information. Additional query words: 2.10 3.00 errmsg alert ====================================================================== Keywords : Technology : kbMailSearch kbMailGateSearch kbZNotKeyword3 kbMailGateSMTP300 kbMailGateSMTP210 Version : MS-DOS:2.1,3.0 ============================================================================= 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 1999.