Changes

Whilst it is impossible to arrive at exact numbers, it is widely believed that spam email now accounts for as much as 40% of all traffic on the internet. The time employees spend deleting unwanted spam messages is believed to cost businesses in the United States alone in excess of $2 billion a year in terms of lost productivity.

Clearly spam email messages are a serious issue which must be addressed by system administrators and IT security employees. A number of solutions to the problem are available but none, unfortunately, provide 100% certainty of either eliminating all spam, or guaranteeing that legitimate messages will not be incorrectly categorized as spam.