Exchange Server not receiving mail from outside

By masoodsharif ·
We are a group of MCSA and we are trying to install and configure Microsoft Exchange Server 2007 at our own. We are succeeded and at this point we are able to send and receive mails locally. But we are still unable to send and receive mails outside LAN.

Our Scenario consists of
1. One Domain Controller + DNS
2. One Exchange Server
3. One Client
4. One ISP router with fix public IP.

We have registered a domain name with and created A and MX record for our domain with SMTP port open.

What we need to do further for sending and receiving mails

Shall we connect our exchange server directly to the internet or our domain controller.

Do we need to configure our local DNS server for mail records.

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Exchange Server not receiving - fire wall?

by cbnsingram In reply to Exchange Server not recei ...

You don't mention anything about a firewall. Your firewall appliance, sitting between the ISP's router and your LAN, most likely defaults to blocking email traffic in both directions (in fact its default settings probably block any inbound traffic other than http.

I suspect that you need to open the e-mail ports on the firewall (for example, port 25 for SMTP traffic).

You also need to create a rule in the firewall that routes all e-mail traffic to the Exchange server's LAN IP address.

Also make sure that the Windows firewall on the Exchange Server is not blocking this traffic. If your LAN is protected adequately from the outside you may consider turning Windows Firewall off completely. However, make sure you understand the possible consequences and that you are certain your LAN is otherwise fully protected from the outside world.

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