external/internal email server

I am getting a router and want to make exchange be our email server for our external and internal email. I know I need an IP address and I am setting up the router for NAT. But what do I do with Exchange to make it our total email server? Also, how do I setup Outlook Web Access?
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steven_alilovicConnect With a Mentor Commented:
First issue you will have to address is IP addresses for external and internal clients.

Are you hosting your own domain name? If so, you will have to setup 2 DNS servers, one configured for the external IP addresses and another configured for the internal IP addresses or somekind of DMZ arrangement.

If you are not hosting your domain name, set your MX record for your domain name to be the global IP address you are NATing the server too.

Outlook Web Access is installed by default I believe now.
so for internal clients to access type something like

for external clients
http://<FQDN - fully qualified domain name>\exchange
eg http://servername.yourdomain.com\exchange

One a global address is setup you then have to determine the services you want to run. ie SMTP,POP,WWW

Ports you will require open are
SMTP port 25  
POP  port 110
WWW  port 80    if you want to provide OWA

you may want to setup SSL for more security for OWA.

where it states

this should be

Dear Mr.Setven,

     I have the same problem Mr.Steven, Can you help me?,
I have register a domain name, and then i configured a
exchanger server for my internal mail service.  It works fine.

  My problem is i want to use the same mail address for internet also.  For exmaple my exchange server domain name is MS.COM.  I am using the email address admin@ms.com for internal mail communication.  Now i want to receive the emails from internet also for that same email address.  My register domain name and exchange server DNS name are same.  Here i have changed the exchange server domain name for the purpose of security... It is dose n't mean to hide from you.  You can understand.  What are things to be configured for receiving the mails from the internet with this email address.  

I think i have provided as much as information in my request.  If you need any more infomation also i am ready to given...

Please help me...

with advance thanks,
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If you have configured the exchange server correctly,

First you must have a static global IP address assigned to your mail server. This can be done in two ways

1) Assign the IP address to the machine, either have two ip address on one NIC or add a second NIC and add the IP address to it.

2) Configure NAT to translate the global IP address to the internal address.

contact your ISP or domain name hosting provider, a request to add an MX record to your domain they should know what to do, make the MX (mail record) matches your global IP address.

Lastly configure an firewall or security device you have to allow the  ports listed above access to that IP address.

That should be it, if you are hosting your own domain name, you will have to follow the instructions listed above.
Dear Steven,

    Thank you Mr.Steven,  I have confiugred the Using two NIC card in the same machine one with internet and another one with intranet.  I will contact ISP and update you.  Thank you very much.  If you can tell me in more detail regarding the MX. It may help me... Thank you for your qucik response...

With regards,
brockp_mcseAuthor Commented:
I am going to try this, thank you for your response. I would be interested in getting more information on the Outlook Web Access. I tried to access it through the Internet but am getting permissions problem. How do I fix that?
Thanks again,
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