By Cargo / Passengers
Passengers Carriers — Email Security
63.6% of active passengers carrier domains have no enforced DMARC — leaving this segment open to email impersonation, payment-redirect fraud, and cargo theft via phishing.
No enforced DMARC
63.6%
national: 80.1%
p=reject
16.0%
national: 7.5%
Microsoft 365
39.9%
national: 38.1%
M365 + no DMARC (carriers)
1,245
national: 92,822
MTA-STS
6.1%
national: 3.3%
DNSSEC
5.0%
national: 6.1%
Dead domains
233
of 5,214 scanned
Total carriers
6,508
234 with dead domain
Risk bands — Passengers 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+ | 417 | 343 |
| High | score 50–69 | 1,267 | 1,046 |
| Medium | score 30–49 | 2,556 | 2,116 |
| Low | score 15–29 | 1,936 | 1,386 |
| Minimal | score <15 | 98 | 90 |
Passengers vs. national average
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.