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I have seput the exchange 2010 standard edtion in our small organization.Internally i am able to send and receive the emails. <br />
Now i want to send and rceive the emails from internet.<br />
I have googled about and know the MX records need to configure.<br />
I don't know what id MX record , how to create and , how to configure, what are required steps need to be done at exchange server end to send/receive emails?<br />
<br />
We didnt setup the Firewall/gateway? In future we have plan , If we setup Firewall/gateway in future what are the changes need , how we configure the mail to internet?<br />
<br />
Give some explanation if possible with pics.<br />
<br />
Thanks&amp;Regards<br />
Bunty
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I have seput the exchange 2010 standard edtion in our small organization.Internally i am able to send and receive the emails. 
Now i want to send and rceive the emails from internet.
I have googled about and know the MX records need to configure.
I don't know what id MX record , how to create and , how to configure, what are required steps need to be done at exchange server end to send/receive emails?

We didnt setup the Firewall/gateway? In future we have plan , If we setup Firewall/gateway in future what are the changes need , how we configure the mail to internet?

Give some explanation if possible with pics.

Thanks&Regards
Bunty

how to Expose MS Exchange Server to the Internet

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.