I tell them after the mailman says, Here "s your mail."
在邮递员说过这是你的邮件之后。这是你的邮件。
2
To unblock mail from sender (s).
解除对来自发件人的邮件的阻止。
3
Secure Multipurpose Internet Mail Extensions (S/MIME) allows digital signatures to be attached to e-mail messages, such that the recipient can verify the identity of the signer.
安全多用途 Internet 邮件扩展（Secure Multipurpose Internet Mail Extensions，S/MIME）允许将数字签名附加到电子邮件消息上，这样接收方就可以验证签名者的身份。