Many times there are negotiations that take place before the applicant is imported, so it would show in the history and with just one click on the system.

Glyn: emails that come into the intray will be automatically save to a persons notes if they are in the system. So for emails came in before you add them you can 'link as a note'
I recommend using the search bar for the email of the applicant and then decide which emails you would like to save.