电邮炸弹是国际互联网上的一种恶意滥用电子邮件的行为，其目的是使目标邮箱超额或使目标邮件服务器瘫痪。有两种形式的电邮炸弹：群发电子邮件和滥订邮件列表。

In Internet usage, an email bomb is a form of net abuse consisting of sending huge volumes of email to an address in an attempt to overflow the mailbox or overwhelm the server where the email address is hosted in a denial-of-service attack.