Hi Thomas, Firewalls can't prevent relay. You need to configure the Exchange Server correct to prevent relay from all users (I used to recommend allowing relay from authenticated users, but criminal spammers are now having success at taking advantage of that configuration). HTH, Tom www.isaserver.org/shinder _____ From: Kamire, Thomas [mailto:Thomas.Kamire@xxxxxxxxxxxxxxxxx] Sent: Thursday, November 27, 2003 6:45 AM To: [ExchangeList] Subject: [exchangelist] Exchange Relay http://www.MSExchange.org/ I am having Exchange 5.5 behind a firewall. Is there any problem if I do not close the relay? The configuration of the PIX 515E Firewall is very well done. Can someone advise. Regards Thomas E. Kamire Systems Engineer Kenya Airways Ltd, P.O. BOX 41010 Nairobi, Kenya Tel: +254+2+32072311 Cell: +254 722 483 253 thomas.kamire@xxxxxxxxxxxxxxxxx <mailto:thomas.kamire@xxxxxxxxxxxxxxxxx> "Lets Make Things Better - Together" <http://www.kenya-airways.com/> ------------------------------------------------------ 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 ------------------------------------------------------
