In January 2026, a mid-market financial services firm caught an active email attack operation at the credential-capture stage, before any payment was touched. Their legacy secure email gateway, running in parallel, generated ...

AI agents introduce serious cybersecurity risks - from prompt injection to email spoofing. Learn how to secure agentic workflows with least-privilege access, audit logging, and DMARC enforcement ...

compauth=fail in your email headers means Microsoft’s composite authentication rejected your message. Learn what it is, what each reason code means, and exactly how to fix it ...

Email forwarding is simple to set up — but it silently breaks SPF, DKIM, and DMARC. Learn how forwarding works, why it causes delivery failures, and the best practices to prevent them ...

Originally published at Forget DMARCbis. It’s just DMARC Now by Hagop K.. After years of drafts, working group debates, and ... The post Forget DMARCbis. It’s just DMARC Now appeared first on ...

TL;DR This week's pattern is authentication-passing phishing. The five attacks below cleared SPF, DKIM, DMARC, or some combination of them, and landed in inboxes anyway. One came from a purpose-built Microsoft 365 ...

Originally published at NCSC is Completely Rtiring Web Check and Mail Check in March 2026 by Ruben Khachatryan. The UK’s National Cyber Security Centre (NCSC) has ... The post NCSC is Completely ...

Originally published at Best SPF Flattening Tools by EasyDMARC. If your domain relies on multiple email services, ... The post Best SPF Flattening Tools appeared first on EasyDMARC ...

Attackers are now impersonating invitation services to trick people into clicking malicious links and sharing sensitive information. These phishing attempts look like legitimate event invites, making them especially effective. In this episode, ...

Originally published at DKIM2 Explained: What’s Changing and What to Do by Hagop K.. Our team was at a deliverability summit where ... The post DKIM2 Explained: What’s Changing and What to ...