Measured 2026-08-20 · public DNS
Is montesson.fr protected against email spoofing?
No — montesson.fr has no DMARC policy and can be spoofed.
Stronger than 0% of city halls in France
12% of the sector already enforces p=reject
See the sector barometer →See the whole sector →
F
DMARC
absent
SPF
-all
DKIM
none found
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What this means
- • No DMARC record published (_dmarc). Receivers have no policy to apply.
- • No DKIM key found on the common selectors (the domain may use non-standard selectors).
- • 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 measurementNo DMARC
About Montesson
The Mairie de Montesson refers to the municipal administration of the commune of Montesson, located in the Yvelines department, in the Île-de-France region of France. Situated within a bend of the Seine river, near Sartrouville, Le Vésinet and Carrières-sur-Seine, the commune forms part of the greater Paris urban area while retaining a notably residential character. The town hall serves as the seat of local executive authority and the place where the powers granted to this territorial authority are exercised.
Historically, Montesson developed around an agricultural, particularly market-gardening, vocation, with the surrounding plain long serving as one of the areas supplying produce to Parisian markets. This rural identity gradually gave way to denser urbanization during the twentieth century, driven by the growth of the Paris region, though the commune has not entirely lost its connection to the agricultural and natural spaces that still remain across part of its territory. The commune has thus undergone a gradual transformation of its urban fabric and population.
As a territorial authority, the Montesson town hall carries out the tasks generally assigned to French communes: civil registry services, management of public facilities, urban planning, social welfare support, maintenance of local roads, organization of school and after-school services, as well as support for local associations and cultural life. It represents the local level of public administration for residents and serves as a link between departmental and regional bodies and the resident population. Its activities fall within the legal powers granted to communes, in coordination with any intercommunal structures to which Montesson may be affiliated. The website montesson.fr is the official website of the commune, providing municipal information and online services for residents and users.