It is likely that your home email account cannot receive DriveHQ emails. Please check your spam filter settings. It is very often that emails be filtered to the junk/bulk mail folder. Otherwise, you can cut & paste the share notification email and send it from your own email account.
If you share files to a group of people, you might want to consider using Group Account service. With a group account, you can create/manage/delete/reset sub-accounts. You can allocate storage and download bytes to sub-users; you can easily share files/folders to group sub-users.
