Bleeping Computer

Attackers can hide 'external sender' email warnings with HTML and CSS

The "external sender" warnings shown to email recipients by clients like Microsoft Outlook can be hidden by the sender, as demonstrated by a researcher. Turns out, all it takes for attackers to alter ...
Bleeping Computer

Office 365 Phishing Uses CSS Tricks to Bypass Email Gateways

A phishing campaign using Office 365 voicemail lures to trick them into visiting landing pages designed to steal their personal information or infect their computers with malware. The phishing emails ...
Dark Reading

Attackers Use Unicode & HTML to Bypass Email Security Tools

Cybercriminals have been spotted using HTML/CSS and Unicode tricks to bypass tools meant to block malicious emails, marking a new twist in phishing techniques, security researchers report. Attackers ...
Threat Post

ROPEMAKER Exploit Allows for Changing of Email Post-Delivery

An exploit dubbed ROPEMAKER relies on taking advantage of email design functionality, namely by remotely changing CSS in HTML-based emails after they’ve been sent. Researchers say a new exploitable ...
Ars Technica

HTML email and CSS

Anyone know of a source to explain using CSS in HTML email? We send out a monthly reminder and have been having problems getting the CSS to work correctly.<BR><BR>When I uses Entourage to send it. it ...