Guatam, Check to make sure that 'My server (SMTP) requires authentication' box is checked. I believe you will find it under the server tab in the properties. HTH Ron -----Original Message----- From: Gautam [mailto:jkakkar@xxxxxxxxx] Sent: Thursday, November 11, 2004 1:08 PM To: [ExchangeList] Subject: [exchangelist] Unable to relay mails http://www.MSExchange.org/ Hi All, I am configuring my Outlook Express for POP3 access. I am able to recieve mails but when i try to send i get the below mentioned error. The error is "The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'abc@xxxxxxxxxxx'. Subject '', Account: 'xxx.xx.xxx.xxx', Server: 'xxx.xx.xxx.xxx', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for abc@xxxxxxxxxxx', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79" can someone please help in resolving this issue. its very Urgent Thanks Gautam ------------------------------------------------------ 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: rleach@xxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx