By saying you have the PIX configured very well, does that mean you are using the SMTP fixup protocol? If so, you are going to have problems. The firewall should not be doing any kind of SMTP proxy unless is it is app aware, like ISA is for Exchange. You must have your Exchange server locked down for relay settings else some spammer will find it and use it as an open relay. John Tolmachoff Engineer/Consultant/Owner eServices For You -----Original Message----- From: Kamire, Thomas [mailto:Thomas.Kamire@xxxxxxxxxxxxxxxxx] Sent: Thursday, November 27, 2003 4:45 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 <mailto:thomas.kamire@xxxxxxxxxxxxxxxxx> 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 ------------------------------------------------------
