Thanks for reply My users are receiving emails properly. Some of them are Internet users and some are only local users, but I can send email internally from anybody's account w/o authentication through telnet. Is it correct? Smita Steve Moffat <steve@xxxxxxxxxx> wrote: http://www.MSExchange.org/ This is ok. How else would your users receive emails??? S -----Original Message----- From: Exchangeuser [mailto:smita_gune@xxxxxxxxxxx] Sent: Wednesday, April 13, 2005 7:47 AM To: [ExchangeList] Subject: [exchangelist] SMTP test , http://www.MSExchange.org/ Hi I am using exchange 2003 Exchange server in Front end/back end enviorment . When I am doing SMTP test with telnet to my server,It works well with outside user,means it is not allowing to send email to outside world. But it is allowing to send email in my domain from any user to any user . How can I provide authentication for sending mail ? Is it an open relay ? I know it is not on internet, but it is on internal network. how can I stop this? Please help me ------------------------------------------------------ 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: ExchangeMailingList@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx The haggis is unusual in that it is neither consistently nocturnal nor diurnal, but instead is active at dawn and dusk (crepuscular), with occasional forays forth during the day and night. ------------------------------------------------------ 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: smita_gune@xxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx Yahoo! India Matrimony: Find your life partneronline.