Your correct there Sam. http://www.dnsreport.com/tools/dnsreport.ch?domain=tgo.ca Mike -----Original Message----- From: Sam [mailto:slai@xxxxxx] Sent: Tuesday, August 31, 2004 10:52 AM To: [ExchangeList] Subject: [exchangelist] Can not received someone's email http://www.MSExchange.org/ Hello all, We are using exchange 2003 FE and BE server. I have a client could not send us an email. Here is the error message below: The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'xxx@xxxxxxx'. Subject 'test ', Account: 'xxx.xxxx.xxx', Server: 'smtp.xxxx.xxx', Protocol: SMTP, Server Response: '550 5.7.1 <xxx@xxxxxxx>... Relaying denied. IP name lookup failed [xxx.xxx.xxx.xxx]', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79 Any idea? Thank you Sam ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: dufoem@xxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx