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Outlook 2000 can't find server on LAN

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8 replies

by mikeb

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Now this may belong in a networking one (ill post there as well), but hopefully someone can help here. Just covering my bases.

I have just set up a LAN and my outlook refuses to connect or find the mail servers. For that matter I cannot ping outside IP addresses (i get time outs) and no host is returned when i try and ping domains.

IE does work (i manually configured the proxy server). Both machines run win2000 and the network works for file sharing and print sharing, just not email! it is a peer to peer network.

I'm sure I have just missed something painfully simple, but im very new to making email run over a LAN, so any help is greatly appreciated.

8 replies

by lordinfidel

First, unless you are letting ICMP thru your proxy then that is the reason you can not ping remote IP's.

But can you ping the proxy?

Next, If your mail server is sitting outside of your proxy, did you map smtp traffic thru the proxy.

If youare trying to connect to exchange you need ports tcp 135, 137 and 139 open.

POP e-mail you should be able to get thru with just tcp 25 open.

If the mail server is on the lan, can you ping the mail server from another host on that segment? Vice-Versa?

Look at subnet mask, are both hosts on the same subnet? If not, was this intentional. If so look at the gateways. Is your gateway setup to route between the 2 subnets?

In order to ping a domain, it needs to resolve it to a IP address. In order to do that you will need access to a DNS server. Plus you will need to allow DNS requests out which should be tcp 54.

by kenalmoore

This sounds like a WINS problem.
First I would reboot the mail servers, make sure they are regestered in WINS. reboot all the outlook clients and make sure they are pointed toward the WINS server also.
This means put the correct DNS and WINS IP innetwork neighborhood. ok Hope this helps.

by curlergirl

There are a couple of possibilities connected with name resolution and your proxy server. First I need answers to some questions: Are these Windows 2000, NT or Win9x clients? Do you have NetBIOS over TCP/IP enabled on all your clients? Are you using private, static IP addresses or do all of your workstations have public IP addresses? I assume that your email server is at your ISP, outside the proxy server. Do you have your packet filtering set on the proxy server to allow SMTP (port 25) and POP3 (port 110) traffic through? I'll try to help more if you can post the answers to these questions. . .

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