同时，所有网络服务商应该建立一个电子邮件地址身份系统(有两个好的标准，域名密钥和存储保护特征)。

At the same time, all ISPs should implement an E-mail ID system (there are two good standards, called Domain Keys and SPF).

youdao

同时，所有网络服务商应该建立一个电子邮件地址身份系统(有两个好的标准，域名密钥和存储保护特征)。

At the same time, all ISPs should implement an E-mail ID system (there are two good standards, called Domain Keys and SPF).

youdao