--- title: "Wisconsin Trucking Email Security: 77.0% Lack DMARC | EFROS" description: "Email-security posture of 13,274 active motor carriers in Wisconsin. 77.0% of domains have no enforced DMARC, 10.0% use p=reject. Free, public, source-cited." canonical: https://efros.com/research/us-trucking-email-security-index/by-state/wisconsin/ --- - [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/) - /Wisconsin By State / Wisconsin # Wisconsin Trucking Email Security **77.0%** of active carrier domains in Wisconsin 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: #9 Carriers: 13,274 Domains: 9,644 By [Stefan Efros](https://www.linkedin.com/in/stefanefros-cyberdefense/), CEO & Founder, EFROS Updated · May 19, 2026 No enforced DMARC 77.0% national: 80.1% p=reject 10.0% national: 7.5% Microsoft 365 40.9% national: 38.1% M365 + no DMARC (carriers) 2,976 national: 92,822 MTA-STS 3.8% national: 3.3% DNSSEC 4.6% national: 6.1% Dead domains 624 of 9,644 scanned Total carriers 13,274 628 with dead domain ## Risk bands: Wisconsin 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+ | 1,032 | 843 | | High | score 50-69 | 3,792 | 2,563 | | Medium | score 30-49 | 5,534 | 3,921 | | Low | score 15-29 | 2,099 | 1,602 | | Minimal | score ## Wisconsin vs. national average No enforced DMARC 77.0% vs 80.1% national p=reject adoption 10.0% vs 7.5% national MTA-STS 3.8% vs 3.3% national DNSSEC 4.6% vs 6.1% national ## What the Wisconsin numbers actually mean **DMARC posture.** Wisconsin's share of carrier domains with no enforced DMARC sits at **77.0%**, better than the national average by 3.1 points. Wisconsin carriers adopt the enforced p=reject DMARC policy at a meaningfully higher rate than the national pool. At the protective end of the distribution, 10.0% of Wisconsin domains are at p=reject, the only DMARC policy that actually instructs receivers to drop spoofed mail. **Microsoft 365 surface.** Microsoft 365 mailflow adoption is heavier than the national distribution, which is consequential: every M365 tenant already includes the controls needed to enforce DMARC, so the 2,976 M365 carriers in Wisconsin with DMARC disabled are leaving paid-for protection switched off. That share is **22.4%** of all Wisconsin 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 3.8%, materially below the threshold a freight payment-redirect attacker would have to clear to be inconvenienced by transport-layer policy. DNSSEC adoption in Wisconsin runs at **4.6%** (vs 6.1% national), which matters for downstream DKIM and MTA-STS validation but is still a minority signal. **Risk-band shape.** Wisconsin's critical-band share is 7.8% versus 8.4% nationally, with the pressure shifting into the high band (28.6% 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 Wisconsin-based carriers, the operational exposure is the 77.0% 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 Wisconsin with other states States closest in carrier-count rank to Wisconsin. Each is scored on the same DNS-derived control set, so the comparison is apples-to-apples. [### Michigan Rank #878.1% no DMARC · 13,943 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/michigan/) [### Illinois Rank #1077.9% no DMARC · 12,352 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/illinois/) [### Minnesota Rank #779.3% no DMARC · 14,179 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/minnesota/) [### Washington Rank #1178.0% no DMARC · 11,961 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/washington/) [### Georgia Rank #680.5% no DMARC · 15,569 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/georgia/) [← 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/logistics/#trucking) [Talk to EFROS](https://efros.com/contact/?source=trucking-email-research) Data as of 2026-05-20 from 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/).