Email security faces rising threats from exotic file formats and AI-driven attacks

Email remains a primary vector for cyberattacks, including phishing, ransomware, and social engineering. Threat actors are increasingly using exotic file formats, such as ISO disk images, to bypass EDR and email protection solutions. These files can be mounted natively by operating systems without requiring suspicious user actions like decompression.

To combat these vulnerabilities, security standards like SPF, DKIM, and DMARC have been developed to authenticate sender identities. As of May 2026, DMARC has become an official IETF standard (RFC 9989), with effective protection requiring quarantine or rejection policies rather than mere observation. Other protocols like MTA-STS and DANE further enhance security by enforcing transport encryption.

In response to the rise of AI-generated attacks and complex SaaS ecosystems, EasyDMARC has launched an Email Trust Platform. This agentic intelligence platform aims to provide unified visibility, risk identification, and governance across evolving email infrastructures to mitigate modern security challenges.