This document discusses potential threats that may arrive in the mail stream and how to identify and reduce risks from them. It lists chemical, biological, radiological, nuclear, or explosive threats, dangerous items and contraband, hoaxes involving white powder envelopes, and threatening content as potential threats. It also discusses how small businesses can now directly reach customers through online channels like search engines, comparison sites, and marketplaces. Even large retailers like Tesco use platforms like eBay as sales channels.