Q. 人群甄选时必须选择所有用户吗？
A. 不是的，可以滑动滑竿决定要发送的邮箱数量以及对应的人群活跃度，并且两个头部的滑竿都是可以滑动的。
Q. 预估花费是怎么算出来的？
A. 预估花费是根据当前购买的档位所计算出来的花费。比如您花9.99美金买了5000封邮件的发送额度，此次发送1000封邮件，那这1000封邮件的花费为9.99➗5000✖️1000=1.998美金。
Q. 已有人群标签都是什么标签？
A. 已有人群标签是指 联系人板块当中的所有标签
A. 不是的，可以滑动滑竿决定要发送的邮箱数量以及对应的人群活跃度，并且两个头部的滑竿都是可以滑动的。
A. 预估花费是根据当前购买的档位所计算出来的花费。比如您花9.99美金买了5000封邮件的发送额度，此次发送1000封邮件，那这1000封邮件的花费为9.99➗5000✖️1000=1.998美金。
A. 已有人群标签是指 联系人板块当中的所有标签
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