A mail bomb is a malicious act of sending a large number of unsolicited and unwanted emails or physical mail to a specific individual or organization, with the intention of overwhelming their inbox or postal system. This form of cyber attack is often used to disrupt communication and cause inconvenience or harm to the recipient. It can also be used as a form of protest or retaliation against a particular person or group. Mail bombs can contain viruses, spam, or threatening messages, and can have serious consequences for the targeted individual or organization.