---
title: "Large Machinery Carriers — Email Security Posture | EFROS"
description: "Email-security posture of 70,561 active Large Machinery motor carriers. 78.1% of domains have no enforced DMARC, 8.7% use p=reject. Free, public, source-cited."
canonical: https://efros.com/research/us-trucking-email-security-index/by-cargo/machinery/
---

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- /Large Machinery

By Cargo / Large Machinery

# Large Machinery Carriers — Email Security

**78.1%** of active large machinery carrier domains have no enforced DMARC. That leaves this segment open to email impersonation, payment-redirect fraud, and cargo theft via phishing.

Edition: 2026-Q2 Segment rank: #3 Carriers: 70,561 Domains: 60,133

By [Stefan Efros](https://www.linkedin.com/in/stefanefros-cyberdefense/), CEO & Founder, EFROS

Updated · May 19, 2026

No enforced DMARC

78.1%

national: 80.1%

p=reject

8.7%

national: 7.5%

Microsoft 365

40.6%

national: 38.1%

M365 + no DMARC (carriers)

17,450

national: 92,822

MTA-STS

3.8%

national: 3.3%

DNSSEC

5.1%

national: 6.1%

Dead domains

3,284

of 60,133 scanned

Total carriers

70,561

3,288 with dead domain

## Risk bands — Large Machinery 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+ | 5,569 | 5,021 |
| High | score 50–69 | 20,209 | 17,213 |
| Medium | score 30–49 | 28,654 | 24,456 |
| Low | score 15–29 | 12,193 | 9,636 |
| Minimal | score

## Large Machinery vs. national average

No enforced DMARC 78.1% vs 80.1% national

p=reject adoption 8.7% vs 7.5% national

MTA-STS 3.8% vs 3.3% national

DNSSEC 5.1% vs 6.1% national

## What the Large Machinery numbers actually mean

**Segment exposure framing.** Large machinery freight has long lead times, oversized permits, and project-tied schedules — the cost of a load-redirect attack is the project delay on top of the freight value.

**DMARC posture.** The large machinerysegment's share of carrier domains with no enforced DMARC sits at **78.1%**, better than the national average by 2.0 points. Large Machinery carriers adopt enforced p=reject DMARC at a meaningfully higher rate than the national pool. At the protective end of the distribution, 8.7% 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 17,450 M365 carriers in this segment with DMARC disabled are leaving paid-for protection switched off. That share is **24.7%** of all large machinery 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 large machinery carriers runs at **5.1%** (vs 6.1% national).

**Risk-band shape.** Large Machinery's critical and high bands combine to 36.5% of segment carriers, close to the national distribution, so remediation prioritization here should follow the same shape as the national program.

**Best-practice control for this segment.** Industrial shippers moving large machinery should bake DMARC verification into vendor-onboarding alongside permit and insurance verification.

## Compare Large Machinery with other cargo segments

Segments closest in carrier-count rank to Large Machinery. Each is scored on the same DNS-derived control set, so the comparison is apples-to-apples.

[### Building Materials Rank #279.6% no DMARC · 87,015 carriers](https://efros.com/research/us-trucking-email-security-index/by-cargo/building-materials/) [### Hazardous Materials Rank #474.6% no DMARC · 45,574 carriers](https://efros.com/research/us-trucking-email-security-index/by-cargo/hazmat/) [### General Freight Rank #180.6% no DMARC · 169,977 carriers](https://efros.com/research/us-trucking-email-security-index/by-cargo/general-freight/) [### Grain / Feed Rank #579.1% no DMARC · 26,271 carriers](https://efros.com/research/us-trucking-email-security-index/by-cargo/grain-feed/) [### Motor Vehicles Rank #680.2% no DMARC · 22,079 carriers](https://efros.com/research/us-trucking-email-security-index/by-cargo/motor-vehicles/)

[← Full US Trucking Email Security Index](https://efros.com/research/us-trucking-email-security-index/) [← All cargo types](https://efros.com/research/us-trucking-email-security-index/by-cargo/) [Switch to state view →](https://efros.com/research/us-trucking-email-security-index/by-state/)

## 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 2026-05-20 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](https://efros.com/research/us-trucking-email-security-index/).