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Measured 2026-08-20 · public DNS

Is serris.fr protected against email spoofing?

Yes — serris.fr enforces DMARC (p=reject).

Stronger than 92% of city halls in France

12% of the sector already enforces p=reject

See the sector barometerSee the whole sector

A

DMARC

p=reject

SPF

~all

DKIM

1 selector(s)

Eligible for BIMI: publish your logo to display it in inboxes

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How to fix it

Thomas, your AI-powered virtual CISO, finds every sender, writes the exact DNS, and walks your domain safely from p=none to p=reject.

Published record

v=DMARC1; p=reject; pct=100; fo=1:0; rua=mailto:a.y44o4w4o@reports.hornetdmarc.com,mailto:notifications.info@serris.fr; ruf=mailto:notifications.info@serris.fr; adkim=s

What this means

  • Policy p=reject: maximum protection against spoofing.
  • SPF with no final “all” mechanism: neutral default behaviour.
  • At least one valid DKIM key published.
  • 1024-bit DKIM RSA key: still tolerated but below the state of the art — rotate to 2048 bits. (selector1 : 1024 bits)
  • No MTA-STS (_mta-sts): inbound SMTP connections remain exposed to TLS downgrade. Recommended alongside DMARC.
  • No TLS-RPT (_smtp._tls): the TLS failures encountered by senders are not reported.

History

  • 2026-08-20First measurementProtected (p=reject)

About Serris

The Mairie de Serris refers to the municipal administration of the commune of Serris, located in the Seine-et-Marne department, in the Île-de-France region of France. This local authority constitutes the local governance body for residents and economic actors within the territory, handling municipal affairs within the scope of powers granted to French communes. Serris is part of the Val d'Europe area, a territory that has developed significantly since the 1990s in connection with urban planning carried out jointly by public and private actors. The commune belongs to the Val d'Europe Agglomération intercommunal community, a structure with which it shares certain responsibilities, particularly regarding land use planning, economic development, and resident services. This geographic location, close to major leisure facilities and commercial activity zones, has fostered notable demographic and urban growth for what was previously a rural commune. The Mairie de Serris carries out the functions traditionally assigned to French communes: civil registry, urban planning, management of local public facilities, community social services, maintenance of municipal roads, as well as organizing services for families and residents, such as primary schools, early childhood facilities, and municipal sports and cultural venues. It also oversees the organization of local elections and the maintenance of administrative records. The municipal council, elected by residents, sets local policy directions and votes on the municipal budget, within the legal framework established by the State and higher-level authorities. The commune also maintains institutional relations with other municipalities in the Val d'Europe area and with departmental and regional bodies for the implementation of shared public policies. The serris.fr website serves as the official portal of the commune, providing administrative, practical, and institutional information as well as online services for residents and users.

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