We were just discussing that here, and started asking ourselves "why do we even need to involve the other ISPs DNS server at all?"... -----Original Message----- From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] Sent: Monday, April 25, 2005 14:30 To: [ISAserver.org Discussion List] Subject: [isalist] RE: Split DNS Questions... http://www.ISAserver.org Hi Dan, But you need MX records for both of them too. OK, it looks like you have both of those now, so things should work. F:\>nslookup Default Server: marsoutpost.tacteam.net Address: 192.168.1.34 > set type=mx > mapsnet.org. Server: marsoutpost.tacteam.net Address: 192.168.1.34 Non-authoritative answer: mapsnet.org MX preference = 10, mail exchanger = mail.mapsnet.org mail.mapsnet.org internet address = 207.75.63.2 mail.mapsnet.org internet address = 24.213.58.250 > Tom www.isaserver.org/shinder Tom and Deb Shinder's Configuring ISA Server 2004 http://tinyurl.com/3xqb7 MVP -- ISA Firewalls