Next step is to review the logs for the connection attempt and the server response. John Tolmachoff MCSE CSSA Engineer/Consultant eServices For You www.eservicesforyou.com -----Original Message----- From: AMANI A. AL-HEID [mailto:Amani@xxxxxxxxxxxxxxx] Sent: Saturday, August 09, 2003 11:08 PM To: [ExchangeList] Subject: [exchangelist] RE: Outlook express http://www.MSExchange.org/ i checked the requires authentication option on the client and the problem did not solved -----Original Message----- From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] Sent: Saturday, August 09, 2003 6:23 PM To: [ExchangeList] Subject: [exchangelist] RE: Outlook express http://www.MSExchange.org/ Since that KB says you have 3 options, and since you did not state what you did, you must on the mail client check My outgoing server requires authentication. If you allow anonymous on the mail server, you become an open relay. John Tolmachoff MCSE CSSA Engineer/Consultant eServices For You www.eservicesforyou.com -----Original Message----- From: AMANI A. AL-HEID [mailto:Amani@xxxxxxxxxxxxxxx] Sent: Saturday, August 09, 2003 4:01 AM To: [ExchangeList] Subject: [exchangelist] Outlook express http://www.MSExchange.org/ Hi all, when im using outlook express to send emails , my email is rejected with the following error: " The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'user@xxxxxxxxxx'. Subject 'Re: test', Account: 'mail.domain.com', Server: 'mail.domain.com', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for user@xxxxxxxxxx', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79 " I read the Microsoft Knowledge Base Article - 290808 . I did what was written but the problem did not solved. any one have any idea. Regards, Eng. Amani ------------------------------------------------------ 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: 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: johnlist@xxxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ 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: 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: amani@xxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ 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: 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: johnlist@xxxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')