Dropbox's Employee Email Address Formats

Dropbox uses 7 email formats, with first (ex. john@dropbox.com)
being used 35% of the time.
first_initial lastjsmith@dropbox.com26%
lastsmith@dropbox.com7%
first lastjohnsmith@dropbox.com6%
first last_initialjohns@dropbox.com9%
first '.' lastjohn.smith@dropbox.com2%
other_templateother_template@dropbox.com16%
firstjohn@dropbox.com35%