Email is one of the most useful and more widely used applications of the Internet. So far, however, I have met very few people that seem aware of how suboptimal its usage is, or of the problems that may arise when many people will start to realize it. Please note that, while the rest of this page explains these statements only in the case of email, most of it applies to any other form of direct, person-to-person communication through the Internet (chat, IM, VoIP phone calls, social networking through Facebook or Ning…).