Mail bombing, also known as e-mail bombing, is a form of cyberattack in which an attacker sends a large number of emails to a target email address or server in an attempt to overload it and disrupt its normal functioning. The emails may be sent from a single computer or from multiple computers that have been infected with malware and are part of a botnet.
Mail bombing can be used to disrupt the operations of a business or organization, or to send a political message. In some cases, mail bombing can also be used to extort money from the target. The practice is illegal in many countries, and can result in significant fines or imprisonment.