Some mail programs allow you to set a default domain for e-mail. This lets you send to someone in that domain by specifying only the name portion of the address, not the full firstname.lastname@example.org SMTP address.
Outlook, Exchange and Windows Messaging do not support this feature directly. Here is a workaround:
- Enter the address in the To box as [SMTP:accountname], being sure to include the brackets. The "SMTP" tells Outlook that it's an Internet address. It will try to deliver it to the "accountname" account on your own SMTP server.