DMARC

SPF, DKIM and DMARC: Practical Guide to Detecting Email Spoofing and Phishing

The article explains how email authentication mechanisms SPF, DKIM, and DMARC work together to combat spoofed messages that impersonate trusted services. It provides concrete DNS record examples and shows how to interpret Authentication-Results headers in received emails. SPF verifies authorized sending IP addresses but does not check the visible From address. DKIM adds cryptographic signatures to message content and headers, while DMARC ties these checks to the sender domain visible to users and defines handling policies. The guide also covers common configuration errors, forwarding issues, and why successful authentication does not guarantee message safety. It concludes that these protocols must be combined with additional security measures such as attachment scanning and user awareness training.

JPAAWG 9th General Meeting to Examine AI-Driven Messaging Threats and Global Standards in Tokyo

The Japan Anti-Abuse Working Group will hold its ninth annual General Meeting on November 5-6, 2026, in Tokyo as a hybrid event focused on evolving messaging security challenges. Keynote speaker Tom Bartel from M3AAWG will address worldwide anti-abuse trends and the practical realities of AI-powered attacks and defenses. Sessions will cover the recently standardized DMARCbis specification under RFC 9989, ongoing work on DKIM2 to counter replay attacks, BIMI logo display adoption, and sender guidelines for AI-generated email summaries. Practical workshops will teach DMARC report analysis using real sample data along with related technologies such as ARC, DNSSEC, and MTA-STS. Government agencies including the National Police Agency and Ministry of Internal Affairs and Communications will also present, alongside a dedicated track on post-quantum cryptography.