Could a feature please be added to allow a 'check box' of sorts, so that we can record owners who do not wish to receive 'marketing' communications from our agency - such as newsletters and new marketing opportunities from other departments within our organisation (sales, rentals etc). At present, I have to export the lot owners contact details to Excel, manually delete the known clients, and then issue a bulk email. We have a large client base and this process takes multiple hours, but also leaves us open to mistakes from 'human error' where we may accidently forget to remove a clients information.