Without going into too much technical detail, spam filter software will analyze all incoming messages and flag, divert or delete e-mails that it considers to be spam.

在不涉及太多技术细节的情况下，垃圾邮件过滤软件将分析所有收到的邮件，并标记、转移或删除它认为是垃圾邮件的电子邮件。