The Deliverability Problem: How New Platforms Are Solving Inbox Placement

The article explains that recent enforcement by Gmail, Yahoo, and Microsoft making email authentication (SPF, DKIM, DMARC) mandatory has materially reduced inbox placement and shifted responsibility for deliverability to senders; it outlines how reputation-based filtering, rising complaint rates, and the invisibility of deliverability failures have driven a market for specialized deliverability tooling and platform designs that separate transactional and marketing streams, provide per-stream analytics, and embed authentication and sandboxing to protect sender reputation.