Microsoft 365, formerly known as Office 365, incorporates various anti-phishing measures to protect its users. One such measure is the First Contact Safety Tip, which alerts users when they receive ...

A simple HTML change and the warning is gone! R esearchers say cybercriminals can have fun bypassing one of Microsoft's anti-phishing measures in Outlook with some simple CSS tweaks.… ...

By appending just a few lines of HTML and CSS code, researcher Louis Dion-Marcil showed how an external sender could hide the very warning from an email message. Hiding "external sender" warning ...

The key aspect of this mechanism is that the alert is appended to the main body of the HTML email, opening up the potential for manipulation using CSS embedded in an email message.