Set Up Multiple Email Identities for a Single Account

Step 2: Configure Exchange
Now you need to configure your Exchange server to let Bob and other users relay SMTP mail through Exchange as their aasolutions.com account. To do so, open ESM on your Exchange server. In this example, Thomas and Associates has a single, dual-homed Exchange server connected to the Internet and internal LAN. If your environment is different, you'll need to adjust the configuration steps according to how many network connections and virtual SMTP servers you have—but the overall process is the same.

Navigate to the Protocols\SMTP folder for your Exchange server. In our example, the Default SMTP Virtual Server has an IP address on the internal LAN and services internal clients. The Internet SMTP Virtual Server has an IP address on the Internet and currently receives email from other SMTP servers. SMTP relaying is enabled on the internal SMTP server but disabled on the Internet virtual server to prevent spammers from using the server as a relay point. This means that if Bob's laptop is connected to the internal LAN, he can send mail by using his new aasolutions.com account without any problem, but if he tries to connect when away from the office, the Internet virtual SMTP server will reject his attempt to relay email. . . .