Microsoft Office 365 webmail exposes IP of user

Microsoft Office 365 webmail exposes IP addresses while sending  emails

1. Microsoft Office 365 webmail, inject additional header containing IP address of the sender called "X-originating-ip".

2. The header injected by MS Office 365 look's like this
“authentication-results: spf=none (sender IP is )smtp.mailfrom=test@example.comx-originating-ip: [23.xx.xx.xx]x-ms-publictraffictype: Email"



3. Comparing other Emails provider services like Google,Yahoo,Outlook,the Microsoft Office 365,are found out that only office 365 webmail inject user's local IP address.

4.The only way came out till now for this problem is while sending mails user should use VPN or TOR.

5.If you have been using the Microsoft Office 365 webmail interface to hide your IP address while sending out emails, remember that you are not hiding anything.

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