The auto complete feature suggests names as you type into the To, Cc, and Bcc fields in a new message. A list of possible addresses from your contacts in which either the first name, last name, or email address starts with the text you typed is displayed.
As you continue to type, the list of matching addresses becomes smaller as fewer matches are available. The list disappears if there are no matches.
For example, to send an email message to David Brinks, whose email address is dbrinks@acme.com, when you type D, a list appears showing all possible matches, with the matching portions highlighted. In this case, it might display:
To select a match from the list, you can click the match with the mouse or use one of the following keys to perform an action:
To select an address when composing an email