Why email security still matters: TopSec on layered defence, DMARC & AI risk

Friday, 12th June 2026 Posted 4 hours ago in by Sophie Milburn

In this interview, Niall Mackey, Commercial Director at TopSec Cloud Solutions, explains why email remains the dominant attack vector for SMBs and enterprises alike. He discusses the limits of built-in Microsoft 365 protections, the role of DMARC/SPF/DKIM in both security and deliverability, and how MSPs can use evidence-led assessments to prove risk, increase customer trust, and build profitable security services.

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