Email Deliverability Research
Original data on email authentication health across real domains.
Email Authentication Report 2026: 186 Domains Checked
June 2026 · By The InboxGreen Team
We scanned 186 well-known SaaS, e-commerce, and email tool domains for SPF, DKIM, and DMARC health. Only 69.4% passed all three checks. See who failed and why.