--- title: "Maine Trucking Email Security — 81.0% lack DMARC | EFROS" description: "Email-security posture of 2,664 active motor carriers in Maine. 81.0% of domains have no enforced DMARC, 7.4% use p=reject. Free, public, source-cited." canonical: https://efros.com/research/us-trucking-email-security-index/by-state/maine/ --- - [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/) - /Maine By State / Maine # Maine Trucking Email Security **81.0%** of active carrier domains in Maine 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: #34 Carriers: 2,664 Domains: 1,954 By [Stefan Efros](https://www.linkedin.com/in/stefanefros-cyberdefense/), CEO & Founder, EFROS Updated · May 19, 2026 No enforced DMARC 81.0% national: 80.1% p=reject 7.4% national: 7.5% Microsoft 365 35.2% national: 38.1% M365 + no DMARC (carriers) 541 national: 92,822 MTA-STS 4.4% national: 3.3% DNSSEC 4.3% national: 6.1% Dead domains 125 of 1,954 scanned Total carriers 2,664 125 with dead domain ## Risk bands — Maine 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+ | 239 | 207 | | High | score 50–69 | 910 | 575 | | Medium | score 30–49 | 1,026 | 777 | | Low | score 15–29 | 346 | 256 | | Minimal | score ## Maine vs. national average No enforced DMARC 81.0% vs 80.1% national p=reject adoption 7.4% vs 7.5% national MTA-STS 4.4% vs 3.3% national DNSSEC 4.3% vs 6.1% national ## What the Maine numbers actually mean **DMARC posture.** Maine's share of carrier domains with no enforced DMARC sits at **81.0%**, within 0.9 points of the national average. enforced p=reject DMARC adoption is roughly in line with the national pool: most Maine domains either have no DMARC at all or are stuck at the monitor-only p=none policy. At the protective end of the distribution, 7.4% of Maine domains are at p=reject, the only DMARC policy that actually instructs receivers to drop spoofed mail. **Microsoft 365 surface.** Microsoft 365 mailflow adoption sits below the national rate, which shifts the remediation surface toward self-hosted and Google Workspace estates where DMARC has to be configured at the DNS layer rather than flipped on in a tenant policy. That share is **20.3%** of all Maine 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 (the encrypted-transport policy that prevents DNS-downgrade interception) runs above the national rate, but the absolute floor is still under 9%, well short of where freight payment flows should sit. DNSSEC adoption in Maine runs at **4.3%** (vs 6.1% national), which matters for downstream DKIM and MTA-STS validation but is still a minority signal. **Risk-band shape.** 9.0% of Maine carriers sit in the critical risk band (score 70+), above the national share of 8.4%. A disproportionate cluster carries simultaneously broken SPF, missing or monitor-only DMARC, and no MTA-STS. 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 Maine-based carriers, the operational exposure is the 81.0%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 Maine with other states States closest in carrier-count rank to Maine. Each is scored on the same DNS-derived control set, so the comparison is apples-to-apples. [### Alaska Rank #3378.2% no DMARC · 2,305 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/alaska/) [### Idaho Rank #3578.6% no DMARC · 2,891 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/idaho/) [### Nebraska Rank #3276.7% no DMARC · 4,402 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/nebraska/) [### New Hampshire Rank #3680.3% no DMARC · 1,970 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/new-hampshire/) [### Connecticut Rank #3179.2% no DMARC · 4,450 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/connecticut/) [← 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/trucking-company-msp/) [Talk to EFROS](https://efros.com/contact/?source=trucking-email-research) Data as of 2026-05-20from 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/).