The E-Mail Bomb 

The e-mail bomb is a simple and effective harassment tool. A bomb attack consists of nothing more than sending the same message to a targeted recipient over and over again. It is a not-so-subtle form of harassment that floods an individual's mailbox with junk. Depending upon the target, a bomb attack could be totally unnoticeable or a major problem. Some people pay for their mail service (for example, after exceeding a certain number of messages per month, they must pay for additional e-mail service). To these individuals, an e-mail bomb could be costly. Other individuals maintain their own mail server at their house or office. Technically, if they lack storage, one could flood their mailbox and therefore prevent other messages from getting through. This would effectively result in a denial-of-service attack. (A denial-of-service attack is one that degrades or otherwise denies computer service to others. This subject is discussed in Chapter 14, "Destructive Devices.") In general, however, a bomb attack (which is, by the 
  
way, an irresponsible and childish act) is simply annoying. Various utilities available on the Internet will implement such an attack. One of the most popular utilities for use on the Microsoft Windows platform is Mail Bomber. It is distributed in a file called bomb02.zip and is available at many cracker sites across the Internet. The utility is configured via a single screen of fields into which the user enters relevant information, including target, mail server, and so on