Email Deliverability Research
Original data on email authentication health across real domains.
DKIM Selector Report 2026: 1,247 Domains Analyzed
September 2026 · By The InboxGreen Team
We checked for DKIM records across 1,247 domains. 22.6% had no DKIM found on any common selector. Of those with DKIM, 11.8% still use deprecated RSA-1024 keys, and 18.9% have DKIM present but DMARC still fails due to alignment mismatch.
DMARC Enforcement Report 2026: 1,247 Domains Analyzed
August 2026 · By The InboxGreen Team
We analyzed DMARC adoption across 1,247 domains. Only 43.4% have reached p=reject. 13.5% have no DMARC record at all. 23.6% are stuck at p=none, a monitoring-only policy that provides no protection against domain spoofing.
SPF Mistakes Report 2026: What Goes Wrong and How Often
July 2026 · By The InboxGreen Team
We analyzed 1,247 domains for SPF configuration problems. 32.1% had at least one issue. Softfail accounted for 72% of all problems, and 61% of those domains also had weak or missing DMARC.
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.