Launching KAddressBook from KMail's Tools → Address Book menu choice.

This interface is the epitome of simplicity. Need to consult or update the entry for one of your contacts while reading or composing an email message with KMail? Left click Tools → Address Book, and the KAddressBook application will be launched automatically, allowing quick access to the contact data you want to view or modify.

Using KAddressBook's auto completion feature from inside KMail's message composition window.

When you are composing a new email message, KMail helps you find the recipient's complete email address by presenting a list of probable matches drawn from the contents of KAddressBook and from your email archives, as illustrated above. Just left click an item in the list to use that email address.

Selecting multiple addressees with the recipient selection dialog inside  KMail's message composition window.

When you are addressing a new email message to multiple recipients, KMail provides a convenient method of choosing multiple addressees from the contacts you have saved with KAddressBook. Simply left click the  Select ...  button to open a Drop Down Box that lists all the contacts in the selected address books. Then scroll through the list (or use the handy “Search:” box), select the recipient you want, and left click  Add as To ,  Add as CC , or  Add as BCC  to add this person to the list of email recipients for your new message. Choose  Add as Reply-To  to insert this address into your message as a “Reply To” tag.

Invoking the new contact creation dialog from KMail's message viewing window.

When you receive an email message from someone who is not yet in your address book, KMail makes it very easy to create a new contact. Simply point your cursor at the email address you want to save, then click the right mouse button and a context menu will appear (see above). Select  + Add to Address Book  to add the selected email address to one of your address books. If you recognize this person as somebody who's already in your address book, and he is using a new email address, you may click on  + Add to Existing Contact  instead -- this enters a dialog that will direct KAddressBook to the spot where you want to insert the new email address.

Choosing the address book in which the new contact will be created.

KMail will ask you to choose the address book to which the new contact should be added.

Deciding if you would like to edit the newly created contact now, or later.

KMail will also ask you if you wish to edit the new contact that has just been added. Say  ✔ Yes  if you want to add more data to the new entry right away.