Medido el 2026-07-11 · DNS público
¿Está cmb.fr protegido contra la suplantación de correo?
Sí — cmb.fr aplica DMARC (p=reject).
Postura sin cambios desde el 2026-06-19
Más protegido que el 56 % de bancos en Francia
El 55 % del sector ya aplica p=reject
A
DMARC
p=reject
SPF
-all
DKIM
ninguno encontrado
Apto para BIMI: publica tu logo para mostrarlo en los buzones
Cómo corregirlo
Thomas, tu CISO virtual con IA, identifica cada fuente, escribe el DNS exacto y lleva tu dominio de p=none a p=reject con total seguridad.
Registro publicado
v=DMARC1; p=reject; rua=mailto:arkea@rua.netcraft.com; ruf=mailto:arkea@rua.netcraft.com; aspf=s; adkim=s;Qué significa esto
- • Politique p=reject : protection maximale contre l’usurpation.
- • Aucune clé DKIM trouvée sur les sélecteurs courants (le domaine peut utiliser des sélecteurs non standards).
Historial
- 2026-06-26Primera mediciónProtegido (p=reject)
Sobre Crédit Mutuel de Bretagne
Crédit Mutuel de Bretagne is a French mutual banking institution operating under the domain cmb.fr. As a cooperative bank established in Brittany, it manages a complex email infrastructure encompassing communications with clients, members, employees, and institutional partners. This legitimate messaging ecosystem represents a critical authentication vector for a financial organization.
Securing the cmb.fr domain through DMARC addresses several strategic imperatives. First, domain spoofing prevention remains essential: attackers specifically target financial institutions for phishing and correspondence fraud. Second, the banking sector faces strengthened regulatory obligations, particularly the NIS2 Directive transposed into French law, which mandates protection of critical systems including communication infrastructure. Email authentication via SPF, DKIM, and DMARC constitutes a fundamental technical compliance foundation.
The DORA Regulation (Digital Operational Resilience Act) also applies to financial entities and requires enhanced operational resilience against cyber threats. Implementing DMARC on cmb.fr enables verification of authenticity for messages legitimately sent by Crédit Mutuel de Bretagne and rejection of counterfeits. This authentication policy protects the brand reputation, client trust, and regulatory compliance simultaneously.
The DMARC Observatory documents this institution's email authentication posture to provide transparency regarding messaging security practices within the French banking sector.