Having an odd issue with that myself. We have DSL service with multiple IP addresses assigned to it. One IP address is assigned to our Exchange 2000 server, one of the IP addresses is assigned to a Netopia router which then provides NAT addressing to our users in the building. With that said, any computer that is either receving a NAT address from the Netopia or any computer with a routable IP in the same subnet as the Exchange server can retrieve email from Exchange 2000 with no problem. However, any computer outside our building cannot connect to our Exchange server via IMAP, but can via OWA. DNS queries against Exchange from outside the building work fine. Any ideas? It's almost as if our DSL modem suddenly decided to start filtering, but it's a standard SpeedStream modem provided by SBC (PacBell). An interesting twist... from outside of our building, if you establish a VPN connection with our Netopia router, you can access Exchange via Outlook (IMAP). All machines connecting via POP3 from outside our building receive their email as well (vpn or not). Kinda getting me nutty! Thanks all! Craig A. Weil ----- Original Message ----- From: "Chip Liu" <chip.liu@xxxxxxxxxxxxxxxx> To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx> Sent: Thursday, August 14, 2003 11:58 AM Subject: [exchangelist] Problem accessing Exchange Server remotely using Outlook http://www.MSExchange.org/ Has anyone experienced the problem with accessing Exchange Server 2000 through the Internet using Outlook? Thanks in advance for the information and a solution. Chip ------------------------------------------------------ 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 ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: craig_weil@xxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')