This needs to be done at two ends. 1. Configure SMTP Virtual server to forward all the all mails to Smart Host (specify IP Address of your Unix Server). Exchange is clever engough to deliver internal mails locally. 2. Configure Unix box to forward incoming mails for your domain to Exchange Server. You need to do transport mapping in Unix mailing system. Which mail deamon you will use in Unix? Have I correctly understood your question? Chand -----Original Message----- From: Fush Grubber [mailto:fgrubber@xxxxxxxxxxx] Sent: Wednesday, January 19, 2005 4:13 PM To: [ExchangeList] Subject: [exchangelist] Relocation of SMTP Service to a UNIX box http://www.MSExchange.org/ Hi all, i run a network of about 1000 clients, i have a win2k server with exch 2k sp4, we also have a pix firewall to ward off unwanted traffic. Now the business requires us to move the smtp service from the exchange box to a unix box infront of the firewall, hence all mails sent by clients destined for a domain outside is forwarded to the unix box and all mails from outside will be sent to the unix box and the unix box will forward the mails to the exchange server which sits behind the firewall. Please can i use exchange to do this and if yes how can i achieve this with exchange? _________________________________________________________________ FREE pop-up blocking with the new MSN Toolbar - get it now! http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/ ------------------------------------------------------ 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: cdd@xxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx