Microsoft's web-based Outlook 365 is leaking users' IP addresses in emails

Anyone using Office 365's webmail component to send emails is unwittingly sharing their IP address with the people they communicate with. The web-based Outlook 365 inserts the sender's IP address into the header of an email, which makes it stand apart from other webmail services such as Gmail -- and even Microsoft's own Outlook.com. While the injected IP address serves something of a purpose, it's also a privacy and security risk that many users many not be aware of. See also: Privacy concerns raised that SmartScreen in Edge shares browsing history with Microsoft German schools ban Microsoft Office 365 because… [Continue Reading]