The third preference is for the sender email address.

第三个首选项是发送者电子邮件地址。

youdao

You will need to supply host and port information for your mail server, sender and recipient email addresses, and, in most cases, server authentication information.

您需要提供您的邮件服务器的主机和端口信息、发送器和接收器邮件地址，多数情况下都需要的服务器验证信息。

youdao

Now paste the IP address in this trace route tool and you should get a fairly good idea about the location of the email sender.

然后将ip粘贴到本路由跟踪工具，您应该可以大体知道邮件发送者所在地了。

youdao

While the name tagged to an email sender might suggest "NatWest Bank", a nonsensical email address or one clearly outside the country should raise suspicion.

BBC: Q&A: Phishing for your precious data

Would the investigation have stopped at the discovery of Paula Broadwell as the anonymous email sender?

FORBES: The General, The Biographer, And Unencrypted Email

" And in such case, "you should destroy this message and kindly notify the sender by reply email.

WSJ: Email Disclaimers Proliferate