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Protocol between outlook and exchange

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by gdemoura

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I`m trying to configure a dial-up networking connection between a client with outlook and a server with Exchange 5.5.
I use a modem connection from the client to connect to my company secure network. I`m able to ping my exchange server and telnet it on port 25, but I`m not able to open my mailbox. Is there any specific protocols or ports that I need to open on the routers or firewalls?

Do I nned to do anything in my Exchange 5.5 (like RAS)? My Exchange 5.5 is connected to my LAN only (no modem).

Will it work the same way with Exchange 2000?

Thanks a lot for your help it`s quite urgent

5 replies

by cg it

What DC do you have running on your network? What policies are in effect on the network for rem ote users dial in connections?

by lordinfidel

First off, you have to define how you are connecting.

Telneting to port 25 just means that the server is alive to transfer mail to other mail systems, not to clients.

On your lan, it uses RPC calls and ports (138/139) to communicate with the server. Dialing up over the net and trying to contact to your exchange server will probably not work.

Not unless you are connected via a vpn which allows LAN traffic to be passed.

Next, Trying to open your mailbox over a dial-up connection will probably take forever. It has to download a shit load of information. For my remote users who use VPN, I make them synchronize there mailbox to the system they are using so that it takes less time to open remotely.

If using POP3 (tcp 113) to retrieve mail, your mailserver (plus your firewall) need to be configure to allow for POP3 access.

My reccomendation is to set up a OWA (outlook web access) server so you can connect to your mailbox via the web.

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