Do not open SMTP to the entire internet people from other parts of the world port scan companies looking for ways to send their spam without getting caught, and the last thing your boss wants to hear is how you opened SMTP rely to the internet which allows some bozo from another country to use it has his spam rely point. Simply open port 25 TCP to the net and have it point to your front end Exchange, then make sure that only people on your network including windows authentication users can use SMTP. Andrew -----Original Message----- From: Mustafa Cicek [mailto:mbcicek@xxxxxxxxx] Sent: Thursday, November 11, 2004 4:13 AM To: [ExchangeList] Subject: [exchangelist] SMTP Relay Server and Mail Aliases http://www.MSExchange.org/ Hi! I have front-end and back-end Exchange 2003. I do not want that my front-end Exchange has SMTP relay functionality. I want to deploy a SMTP relay server in DMZ. My problem is: This SMTP relay server is not a member of my Exchnage AD domain and does not know about mail aliases in my Exchange domain. I do not want that I open additional ports on firewall which is between my Exchange domain and SMTP mail relay. My question is: How can I inform that SMTP relay server knows about all mail aliases on my Exchange domain? Best Regards Mustafa ------------------------------------------------------ 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: andrew@xxxxxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx