If they give a wrong answer, or the inquiry is bounced back as undeliverable, their e-mail goes into the junk folder and they are added to the blacklist.

• 如果发信人回答错误，或者质询邮件因发送失败而弹回，他们的电子邮件就会进入垃圾文件夹，同时发信人也被加入黑名单中。