--- title: "Mississippi Trucking Email Security — 77.6% lack DMARC | EFROS" description: "Email-security posture of 1,898 active motor carriers in Mississippi. 77.6% of domains have no enforced DMARC, 9.1% use p=reject. Free, public, source-cited." canonical: https://efros.com/research/us-trucking-email-security-index/by-state/mississippi/ --- - [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/) - /Mississippi By State / Mississippi # Mississippi Trucking Email Security **77.6%** of active carrier domains in Mississippi 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: #39 Carriers: 1,898 Domains: 1,656 By [Stefan Efros](https://www.linkedin.com/in/stefanefros-cyberdefense/), CEO & Founder, EFROS Updated · May 19, 2026 No enforced DMARC 77.6% national: 80.1% p=reject 9.1% national: 7.5% Microsoft 365 34.8% national: 38.1% M365 + no DMARC (carriers) 443 national: 92,822 MTA-STS 3.7% national: 3.3% DNSSEC 7.5% national: 6.1% Dead domains 86 of 1,656 scanned Total carriers 1,898 87 with dead domain ## Risk bands — Mississippi 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+ | 160 | 142 | | High | score 50–69 | 575 | 504 | | Medium | score 30–49 | 766 | 659 | | Low | score 15–29 | 296 | 253 | | Minimal | score ## Mississippi vs. national average No enforced DMARC 77.6% vs 80.1% national p=reject adoption 9.1% vs 7.5% national MTA-STS 3.7% vs 3.3% national DNSSEC 7.5% vs 6.1% national ## What the Mississippi numbers actually mean **DMARC posture.** Mississippi's share of carrier domains with no enforced DMARC sits at **77.6%**, better than the national average by 2.5 points. Mississippi carriers adopt the enforced p=reject DMARC policy at a meaningfully higher rate than the national pool. At the protective end of the distribution, 9.1% of Mississippi 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 **23.3%** of all Mississippi 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 sits at 3.7%, materially below the threshold a freight payment-redirect attacker would have to clear to be inconvenienced by transport-layer policy. DNSSEC adoption in Mississippi runs at **7.5%** (vs 6.1% national), which matters for downstream DKIM and MTA-STS validation but is still a minority signal. **Risk-band shape.** Mississippi's critical and high bands combine to 38.7% of state carriers, close to the national distribution, so remediation prioritization here should follow the same shape as the national program. 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 Mississippi-based carriers, the operational exposure is the 77.6%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 Mississippi with other states States closest in carrier-count rank to Mississippi. Each is scored on the same DNS-derived control set, so the comparison is apples-to-apples. [### Montana Rank #3876.0% no DMARC · 2,247 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/montana/) [### West Virginia Rank #4078.6% no DMARC · 1,799 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/west-virginia/) [### Louisiana Rank #3772.9% no DMARC · 2,593 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/louisiana/) [### Nevada Rank #4174.0% no DMARC · 2,231 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/nevada/) [### New Hampshire Rank #3680.3% no DMARC · 1,970 carriers](https://efros.com/research/us-trucking-email-security-index/by-state/new-hampshire/) [← 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/).