HS MailPerfect is email filtering software which sits behind an email client such as Outlook Express. It wakes up when the client starts checking email messages from the account and lists messages classifying them in three categories : possible virused messages (RED), spam messages (YELLOW) and useful messages (GREEN). Selected messages are removed from the remote account. In other words, viruses and spams do not pass through the local machine instead they are totally removed from the server. Besides, it prevents wasting incoming traffic not downloading large sized virused emails. Other useful messages pass through the software to the email client (i.e Outlook Express) providing a neat, clean and secure environment for your important archives.