metropolegrandparis.fr

SOA · refresh 2d is outside 20m–1d; negative caching TTL (minimum) 2d is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 2d, retry 1h, expire 20d, negative TTL 2d.

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (30s), AAAA (30s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 5h; resolvers may use either.

SPF · SPF record needs 8 DNS lookups (limit is 10). Problems found: include:whmlanteas-mgp.sitec.corsica does not exist or has no records.

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · The following MX hosts could not be resolved to IPv6 addresses: de-smtp-inbound-1.mimecast.com, de-smtp-inbound-2.mimecast.com

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector2 (1024 bits). Rotate to a 2048-bit key.

SPF · 1 include/redirect target does not exist or has no records (limit is 2). This usually is a stale include; remove it.

TLS · With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.

TLS · These MX hosts are not listed in the MTA-STS policy (mx: *.mail.protection.outlook.com): de-smtp-inbound-1.mimecast.com, de-smtp-inbound-2.mimecast.com. This will break delivery once the policy is enforced.