Author(s): Wei Liu, Xiumin Chen, Kangming Wu, Rong Yu, Xinglong Fu, Ruijiao Jia, Yunmin Chen, Jichang Kang
const origAppend = sb.appendBuffer;
，这一点在Line官方版本下载中也有详细论述
// property lookup, so we do that here.
If the subject line of the email is irrelevant to customers, they will ignore it multiple times. But, if it keeps repeating, they are intercepted and unsubscribed from your emails. So, send relevant emails for the benefit of the customer. Don't send emails that often only focus on sales, offers and discounts.