An alias is a private name for one or more user names (or user addresses). By creating a distribution list of user addresses to which you frequently send mail and giving the list a name, you can just type the name of the alias instead of typing each address in the To or Cc field every time you send messages.
The name you give to your alias can be descriptive of a group of users, or just a name you will remember.
Choose Aliases from the Options menu in the main window, from the Format menu in a Compose window, or from the To or Cc button menu in the Compose window.
The Aliases Options dialog box is displayed.
Type the name for your alias in the Alias field.
Type the user addresses that will make up the alias in the Addresses field.
Each of these addresses should be in the form username@hostname, separated by a comma, space, or both.
Click Add to add the information in the Alias and Addresses fields to the scrolling list.
Optional. To change an alias, select it and edit the Alias or Addresses field, as appropriate, then click Change.
Optional. To remove an alias, select it and click Delete.
Click OK or Apply to make the settings take effect.