--- title: "Ohio Trucking Email Security — 75.9% lack DMARC | EFROS" description: "Email-security posture of 11,310 active motor carriers in Ohio. 75.9% of domains have no enforced DMARC, 9.0% use p=reject. Free, public, source-cited." canonical: https://efros.com/research/us-trucking-email-security-index/by-state/ohio/ --- - [Home](https://efros.com/) - /[Research](https://efros.com/research/) - /[US Trucking Email Security Index](https://efros.com/research/us-trucking-email-security-index/) - /[By State](https://efros.com/research/us-trucking-email-security-index/by-state/) - /Ohio By State / Ohio # Ohio Trucking Email Security **75.9%** of active carrier domains in Ohio have no enforced DMARC. That leaves freight operators open to email impersonation, payment-redirect fraud, and cargo theft via phishing. Edition: 2026-Q2 State rank: #13 Carriers: 11,310 Domains: 9,138 By [Stefan Efros](https://www.linkedin.com/in/stefanefros-cyberdefense/), CEO & Founder, EFROS Updated · May 19, 2026 No enforced DMARC 75.9% national: 80.1% p=reject 9.0% national: 7.5% Microsoft 365 38.8% national: 38.1% M365 + no DMARC (carriers) 2,532 national: 92,822 MTA-STS 3.5% national: 3.3% DNSSEC 7.2% national: 6.1% Dead domains 446 of 9,138 scanned Total carriers 11,310 447 with dead domain ## Risk bands — Ohio carriers Carrier counts by risk band (composite email-security pain score). Critical = score 70+; Minimal = score <15. | Risk band | Score range | Carriers | Domains | | --- | --- | --- | --- | | Critical | score 70+ | 760 | 686 | | High | score 50–69 | 2,934 | 2,577 | | Medium | score 30–49 | 4,856 | 3,726 | | Low | score 15–29 | 2,211 | 1,615 | | Minimal | score ## Ohio vs. national average No enforced DMARC 75.9% vs 80.1% national p=reject adoption 9.0% vs 7.5% national MTA-STS 3.5% vs 3.3% national DNSSEC 7.2% vs 6.1% national ## What the Ohio numbers actually mean **DMARC posture.** Ohio's share of carrier domains with no enforced DMARC sits at **75.9%**, better than the national average by 4.2 points. Ohio carriers adopt the enforced p=reject DMARC policy at a meaningfully higher rate than the national pool. At the protective end of the distribution, 9.0% of Ohio domains are at p=reject, the only DMARC policy that actually instructs receivers to drop spoofed mail. **Microsoft 365 surface.** Microsoft 365 mailflow adoption tracks the national distribution closely, so the 2,532 M365 carriers in Ohio with DMARC disabled represent the same "paid-for-but-switched-off" pattern that drives the national headline. That share is **22.4%** of all Ohio carriers — a one-flag-flip remediation set that any regional MSP or in-house IT lead can clear in a single quarter. **Transport encryption.** MTA-STS adoption sits at 3.5%, materially below the threshold a freight payment-redirect attacker would have to clear to be inconvenienced by transport-layer policy. DNSSEC adoption in Ohio runs at **7.2%** (vs 6.1% national), which matters for downstream DKIM and MTA-STS validation but is still a minority signal. **Risk-band shape.** Ohio's critical-band share is 6.7% versus 8.4% nationally, with the pressure shifting into the high band (25.9% of state carriers) where one or two control gaps still leave room for impersonation. The composite pain score blends SPF posture, DMARC enforcement, MTA-STS presence, and DNSSEC, so a carrier clusters in the critical band only when several controls fail together. Remediation that flips DMARC to enforcement plus turns on MTA-STS typically moves a carrier two bands down in one quarter. **What this means for buyers and shippers.** If you are dispatching freight, settling broker payments, or receiving rate confirmations from Ohio-based carriers, the operational exposure is the 75.9%of domains that cannot stop a stranger from sending email in the carrier's name. Payment-redirect and load-redirect fraud rides on exactly that gap. Verifying a counterparty's DMARC posture before a first wire (a 30-second DNS lookup) is the cheapest control in the freight stack. ## Compare Ohio with other states States closest in carrier-count rank to Ohio. Each is scored on the same DNS-derived control set, so the comparison is apples-to-apples. [### Massachusetts Rank #1280.3% no DMARC · 9,925 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/massachusetts/) [### Colorado Rank #1479.0% no DMARC · 10,031 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/colorado/) [### Washington Rank #1178.0% no DMARC · 11,961 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/washington/) [### New Jersey Rank #1578.8% no DMARC · 9,844 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/new-jersey/) [### Illinois Rank #1077.9% no DMARC · 12,352 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/illinois/) [← Full US Trucking Email Security Index](https://efros.com/research/us-trucking-email-security-index/) [← All states](https://efros.com/research/us-trucking-email-security-index/by-state/) [Switch to cargo-segment view →](https://efros.com/research/us-trucking-email-security-index/by-cargo/) ## See where your own domain stands The research is free and self-serve. Run the same public checks on your own domain in about a minute — SPF, DKIM, DMARC, MTA-STS, DNSSEC, and more — and get a scored report by email. No agents, no credentials. [Scan your domain free →](https://efros.com/tools/security-scan/) [Email security for fleets](https://efros.com/industries/trucking-company-msp/) [Talk to EFROS](https://efros.com/contact/?source=trucking-email-research) Data as of 2026-05-20from public DNS measurements. Statistics are domain-weighted unless noted. State scope is the carrier's FMCSA-registered state. Methodology: [read the full index](https://efros.com/research/us-trucking-email-security-index/).