An independent cybersecurity review across major South Dakota credit unions reveals a wide range of results. Many organizations handle sensitive communications daily, yet show significant gaps in email authentication and transport security.
Using data from audit.emailmenow.com, we evaluated each domain across email, website, and network security — including SPF, DKIM, DMARC, MTA-STS/TLS, and security headers.
Cybersecurity Scores of Major South Dakota Credit Unions
Overall compliance scores from audit.emailmenow.com, measured June 5, 2026. Re-run any domain at the link to verify.
| Rank | Organization | Domain | Overall Score | Performance Level |
|---|---|---|---|---|
| 1 | Black Hills Federal Credit Union | bhfcu.com | 65% | Above Average |
| 2 | Reliabank Dakota | reliabank.com | 65% | Above Average |
| 3 | Dacotah Bank | dacotahbank.com | 61% | Above Average |
| 4 | Northern Hills Federal Credit Union | northernhillsfcu.org | 54% | Average |
| 5 | Sioux Falls Federal Credit Union | siouxfallsfcu.org | 52% | Average |
| 6 | CorTrust Bank | cortrustbank.com | 46% | Below Average |
What the Results Reveal
- Scores span 65% down to 46% — no institution reached a Good (70%+) posture.
- 2 of 6 scored below 60%, leaving stakeholders exposed to phishing and impersonation.
- Weak authentication undermines compliance expectations and increases BEC and wire-fraud risk.
Why This Matters in South Dakota
South Dakota credit unions and community banks serve members across rural and urban markets. Email authentication gaps increase phishing, account takeover, and wire-fraud exposure under NCUA and FFIEC expectations.
See also — national audit
Recommendations
- Enforce DMARC (
p=reject), strict SPF, and DKIM signing. - Add MTA-STS and website security headers.
- Run periodic domain audits and security awareness training.
Check any organization’s posture. Run a free Instant Cybersecurity Audit at audit.emailmenow.com/?industry=financial-advisors.
Contact EmailMeNow IT Consulting for help with email security hardening and compliance documentation.
Source & methodology: Overall compliance scores from the free scan at audit.emailmenow.com, measured June 5, 2026 — each domain checked for email authentication (SPF, DKIM, DMARC), transport security (MTA-STS/TLS), website security headers, and network security. Re-run any domain at the link to verify.