Make Kmail create contacts when email is sent

[pedromaia]

How do I make Kmail create a contact when I send an email? Thunderbird has this option and it makes very easy to save new contacts.

[blackpaw]

I don't think kmail has that option - would be useful though.

[pedromaia]

It only saves the email (using akonadi?). It will be great to make this saved email a contact tough.