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 ...

Cisco Talos says hackers are abusing CSS in emails The stylesheet language is used to hide content, track people's behavior, ...

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 ...

In the mid-'90s, email experts strongly urged, for varied reasons, against using HTML formatting in email marketing messages. But those reasons have largely been made anachronistic by today's ...

New research shows that up to a half of all HTML email attachments are malicious, and not just because of a few massive campaigns. Researchers warn that attackers are relying more on malicious HTML ...