We have already demonstrated the installation of Exchange Server 2007 SP1 in the Step-by-Step Screencast:
How to Install Exchange 2007 SP1 on Windows Server 2008

In this Screencast, you will see how to perform Exchange 2007 initial configuration. You have to go through these steps because out of the box standard Exchange 2007 installation:

● Does not allow you to send e-mails to the Internet.
● Does not allow you to receive e-mails from the Internet – anonymous SMTP connections are dropped, and that’s how most e-mail servers will send e-mails to your Exchange server.
● In addition, the installation process configures a default e-mail address policy and accepted domain, using the forest root FQDN (Fully Qualified Domain Name). In many cases the e-mail domain which a company uses is different than the one used for Active Directory. It is also possible that you need to be able to accept e-mails for more than one e-mail domains – like the scenario when a company is acquired.

Following the Steps outlined bellow, you will have your Exchange Server 2007 up and ready to send and receive e-mails using the e-mail domain that you need.

Step 1 We start the initial configuration by entering the product key for Exchange Server 2007 SP1. Then, we configure an Accepted Domain for the e-mail domain which the server needs to accept e-mails for.

Step 2 Next, we modify the default E-mail address policy, by adding the new e-mail domain, choosing a suitable address format, and setting the new SMTP address as the primary one.

Step 3 In Step3, we configure Exchange Server 2007 SP1 to receive e-mails from internet.

Step 4 Finally, we configure a Default Internet Send Connector.