In that case, even if the sender side has a static IP address, each ISP would assigning an IP address from a different domain.
在这种情况下，即使发送方有静态IP地址，每个ISP可能会从不同的域分配IP地址。
With an exclusive domain and one mailbox from ISP, you can add or remove mailboxes at any time.
与专访时域和一个邮箱从一个IS P帐号，您可以添加或删除的邮箱在任何时候。
For the attacking response, first, we put forward a secure response scheme which is grounded on ISP domain.
在攻击的响应方面，其一，提出了一个基于IS P域内的安全响应方案。
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