By Cargo / Hazardous Materials
Hazardous Materials Carriers — Email Security
74.6% of active hazardous materials carrier domains have no enforced DMARC. That leaves this segment open to email impersonation, payment-redirect fraud, and cargo theft via phishing.
No enforced DMARC
74.6%
national: 80.1%
p=reject
10.3%
national: 7.5%
Microsoft 365
41.9%
national: 38.1%
M365 + no DMARC (carriers)
11,723
national: 92,822
MTA-STS
3.8%
national: 3.3%
DNSSEC
5.6%
national: 6.1%
Dead domains
1,580
of 39,674 scanned
Total carriers
45,574
1,581 with dead domain
Risk bands — Hazardous Materials 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+ | 2,896 | 2,736 |
| High | score 50–69 | 11,902 | 10,720 |
| Medium | score 30–49 | 19,071 | 16,644 |
| Low | score 15–29 | 9,577 | 7,552 |
| Minimal | score <15 | 547 | 442 |
Hazardous Materials vs. national average
What the Hazardous Materials numbers actually mean
Segment exposure framing. Hazmat carriers operate under heavier regulatory oversight (HMR, USDOT, PHMSA), but the email-security posture sits in the same range as the rest of the industry, so an impersonated dispatch instruction could route hazardous cargo to an unauthorized destination.
DMARC posture. The hazardous materialssegment's share of carrier domains with no enforced DMARC sits at 74.6%, better than the national average by 5.5 points. Hazardous Materials carriers adopt enforced p=reject DMARC at a meaningfully higher rate than the national pool. At the protective end of the distribution, 10.3% of segment domains are at p=reject, the only DMARC policy that actually instructs receivers to drop spoofed mail.
Microsoft 365 surface. Microsoft 365 mailflow adoption runs heavier than the national distribution. Every M365 tenant already includes the controls needed to enforce DMARC, so the 11,723 M365 carriers in this segment with DMARC disabled are leaving paid-for protection switched off. That share is 25.7% of all hazardous materials carriers — a one-flag-flip remediation set that segment-specific MSPs can clear in a single quarter without touching DNS infrastructure.
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 across hazardous materials carriers runs at 5.6% (vs 6.1% national).
Risk-band shape. Hazardous Materials's critical-band share is 6.4% versus 8.4% nationally, with the pressure shifting into the high band (26.1% of segment carriers) where one or two control gaps still leave room for impersonation.
Best-practice control for this segment. For hazmat shippers and brokers, treat DMARC enforcement as a regulatory-defensibility control alongside placarding and routing compliance — both protect chain-of-custody integrity.
Compare Hazardous Materials with other cargo segments
Segments closest in carrier-count rank to Hazardous Materials. Each is scored on the same DNS-derived control set, so the comparison is apples-to-apples.
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.
Data as of 2026-05-20 from public DNS measurements. Statistics are domain-weighted unless noted. Cargo segment membership is based on FMCSA Company Census cargo flags. Methodology: read the full index.