Does Amazon pass custom headers to origin?
亚马逊通过自定义标题的起源吗？
You can also send advanced messages with MIME attachments, custom mail headers, and controlled character sets.
您也能发送具有MIME附件、定制邮件标题以及控制字符集的高级消息。
This is for setting custom HTTP headers to send as part of the call to the remote server.
它用于将定制HTTP头部设置为作为远程服务器调用的一部分发送。
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