Microsoft just raised the bar for high-volume senders — and now Gmail, Yahoo, and Outlook can throttle or reject mail when your deliverability “floor” isn’t solid. This post breaks down what changed, the 2026 minimum-spec checklist (SPF/DKIM/DMARC, unsubscribe handling, list hygiene), and the scorecard you should track to keep outbound reliable at scale.
Gmail’s AI-driven inbox is changing how outbound gets filtered, prioritized, and responded to. This post breaks down the 2026 outbound execution playbook—deliverability fundamentals, sending patterns, list hygiene, and the new scorecard that replaces vanity metrics with pipeline KPIs.
