Spim is perpetuated by bots that harvest IM screen names off of the Internet and simulate a human user by sending spam to the screen names via an instant message.

• 即时垃圾邮件因机器人自动软件而臭名昭著，这种软件从因特网上找到 IM 屏幕姓名并假装真正的用户，通过即时消息将垃圾邮件发送给屏幕姓名人。