By Cargo / Hazardous Materials
Hazardous Materials Carriers — Email Security
74.6% of active hazardous materials carrier domains have no enforced DMARC — leaving 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 — meaning 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, which is consequential — 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
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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.