The Thunderbird address book stores your contact information,
including email addresses and names, phone numbers, instant
messaging addresses, along with other information. When you write a
message or reply to a message, the recipients are automatically added
to the address book. For Macintosh users, entries in address books
that Mac OS X maintains also appear in Thunderbird's address book.
You can also manually add addresses to the address book.
When you compose a message, Thunderbird uses the characters you
enter in the "To", "CC" and "BCC" fields to try to determine the email
address you want to use. Thunderbird compares the characters you
enter to the first and last names of people in your address book, and
the "name" portion of the email address (not the domain). Matches
appear in a drop-down list.
OPEN THE ADDRESS BOOK
Here's how to open Thunderbird's Address Book. Once it's open, you
can view, edit or delete the entries in your address book.
Open the Address Book by clicking the Address Book button.
The left panel in the address book displays individual address books.
The top panel on the right displays the addresses within the selected
address book. The bottom panel on the right displays information for
the address book selected in the top panel.