coutances.fr

SOA · negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1d, retry 1h, expire 1000h, negative TTL 1m.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits). Rotate to a 2048-bit key.

DKIM · These keys have t=y, so receivers treat DKIM failures as a test: dkim. Remove t=y once DKIM works.

DMARC · These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:admin@ville-coutances.fr!4m (needs coutances.fr._report._dmarc.ville-coutances.fr); mailto:admin@ville-coutances.fr!10m (needs coutances.fr._report._dmarc.ville-coutances.fr). Ask the report provider to publish the record, or check the address.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.