In a data-handling machine system which has data originating and replicating units (e.g., smartphones) configured to allow users to create or replicate and transmit voluminous amounts of data (e.g., emails) on a recipients-targeting basis to large numbers of recipients, a communications constraining mechanism is provided which intercepts emails (or other forms of recipients-targeting communications), classifies the communications, categorizes the targeted recipients and then based on the classifications and categorizations, generates recommendations on whether to block or let through as is the intercepted communications to their intended recipients.