Perl is required for KML building, as well as extracting E-mail header information.

构建KML以及提取电子邮件标题信息需要使用Perl。

youdao

So from your point of view, this is nothing you can put in the mail header, but gets handled by the clients email-account-provider.

所以从你的观点来看，这是什么你可以把邮件标题，但是得到处理客户邮件帐户提供商。

youdao

An E-mail message's structure is composed of the message header and the message body.

电子邮件的结构是由消息头和消息体组成的。

youdao

Some forge their e-mail header--the data above and below an e-mail that contains information about the recipient and sender.

FORBES: Spam Warfare