讀取 Email郵件的Header

資料來源：Email Fundamentals: How to Read Email Message Headers
http://exchangeserverpro.com/how-to-read-email-message-headers/

文內介紹存取各收件程式如何取得Header的方式，Outlook 2007、2010、2013

基本格式
Received: from servername (IP address) by servername (IP address) with MTA-name; timestamp

可以貼到Notepad上解讀，但還有其他三個工具可以做



Microsoft Remote Connectivity Analyzer
https://testconnectivity.microsoft.com/

MXToolbox

Google Apps Toolbox
https://toolbox.googleapps.com/apps/messageheader/