Turns out, all it takes for attackers to alter the "external sender" warning, or remove it altogether from emails is just a few lines of HTML and CSS code. This is problematic as phishing actors ...

This text-based tutorial is intended for people who learn fast through a combination of reading and images — it’s possible to learn HTML and CSS foundations in 15 minutes through this tutorial.

A style sheet is a collection of rules that tells a web browser how to display a document written in HTML or XML. CSS is used to style all HTML tags, including the document's body, headings ...

The preferred practice is to put style information in a separate file with a .css extension. Using formatting information contained within an external cascading style sheet is accomplished via the ...

The code remains the same, the only thing that has changed is the external .css file. Yes, really ... You may modify the style sheet in any way you wish, but not the HTML. This may seem daunting at ...