Administrative Groups -> Servers -> SMTP Properties -> Advanced > Check Perform reverse DNS on incoming... -----Original Message----- From: Kelli Irwin [mailto:kelli@xxxxxxxxxxxxxxxxxxxxxx] Sent: Monday, March 22, 2004 10:29 AM To: [ExchangeList] Subject: [exchangelist] Reverse DNS Lookup http://www.MSExchange.org/ Hi All, Is it possible to set up Exchange 2000 to perform reverse DNS lookups AND reject any email that fails? If so, how? Thanks, Kelli ------------------------------------------------------ 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 ------------------------------------------------------