What do you mean by different networks?, different domains, different forests, different subnets etc etc I would recommend looking at using RPC over HTTP instead of turning your firewall into swiss cheese. Mark Fugatt Dedicated Supportability Engineer (Exchange) Microsoft Services Organisation Desk: +44 (0)118 909 5630 Mobile: +44 (0)7966 858108 MSN IM: markfu@xxxxxxxxxxxxxxxxx Blog: http://www.msmvps.com/exchange http://www.microsoft.com/support <http://www.microsoft.com/support> Dedicated to proactively supporting Microsoft's enterprise Customers This email may contain confidential information. If you are not named on the addressee list, please take no action in relation to this email, do not open any attachment, and please contact the sender (details above) immediately. Information in this email is provided in good faith. If you are a customer of Microsoft, please refer to the terms and conditions which cover the provision of support and consulting services to you/your organization. If you are not corresponding in the course of, or in connection with a Microsoft contract or program with its own terms and conditions, please note that no liability is accepted by Microsoft for the contents of this mail. ________________________________ From: Praveen Ramaswamy [mailto:ramaswamy_praveen@xxxxxxxxx] Sent: 29 June 2005 10:42 To: [ExchangeList] Subject: [exchangelist] MAPI access urgent!! http://www.MSExchange.org/ Hi, I need to allow users from different network to access my exchange 2003 server across the firewall. Can you please let me know what are the ports I need to open to allow MAPI client traffic. We use chekpoint firewall. Regards Praveen R ________________________________ Yahoo! Sports Rekindle the Rivalries. Sign up for Fantasy Football <http://pa.yahoo.com/*http:/us.rd.yahoo.com/evt=33539/*http:/football.fa ntasysports.yahoo.com?ovchn=YAH&ovcpn=Integration&ovcrn=Mail+footer&ovrf d=YAH&ovtac=AD%20> ------------------------------------------------------ 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: World of Windows Networking: http://www.windowsnetworking.com 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: markfu@xxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx