7 Essential Things to Know Before Using an SPF Flattening Tool
TL;DR: If you're considering an SPF flattening tool to manage your organization's sender policy framework, you must understand what SPF flattening does, why DNS lookup limits are critical, the risks to dynamic SPF updates, potential security tradeoffs, the need for automated monitoring, DNS and SPF record formatting restrictions, and regular testing. Properly managed, a flattened SPF record can ensure SPF compliance and avoid errors, but improper use can lead to maintenance burden, rejected emails, and security holes.