Title: Protecting Exchange against Spam Author: Amit Zinman Summary: Unsolicited e-mail, more commonly known as spam is a rising and complex problem. Unlike viruses, spam mail does not have a clear and cut signature. Anyone could send you an e-mail you wouldn't want to receive so determining which e-mail you definitely would not want to accept can be tricky. Various anti-spam packages exist. However, integrating them into your mail systems is not trivial. They have so many options that may help you prevent spam but can also cause a lot trouble and increase "where is my mail" type help desk calls. I hope to cover most aspects of combating spam here to make it easier for you to decide which solution is best for your needs. Link: http://www.MSExchange.org/pages/article.asp?id=671