The BBDB interfaces itself with several message-handling packages, but certain parameters control its behavior depending on whether it is being used from within a mail reader or a news reader.
In all of these packages, two new keybindings will be added:
It is possible to configure BBDB so that it automatically creates a record when it sees a message from a person who is not in the database. It is also possible to have text automatically added to the notes field of the corresponding record depending on the contents of the message headers. See section Customization Hooks