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mail bomb

 
 
noun [C] (also email bomb) IT

Definition

an occasion when many email messages are sent to a single address at the same time, for example as a way of complaining or showing anger about something, or in order to annoy someone: Mail bombs choked the mail server and made it impossible for us to get our real messages.
mail-bomb verb [T] Spammers mail-bombed the trade commission as a way to protest the investigation.
(Definition of mail bomb noun from the Cambridge Business English Dictionary © Cambridge University Press)
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