lescrous.fr

Delegation · The addresses at the parent (glue) differ from the addresses in the zone: ns2.nuonet.fr (glue 195.220.9.80, zone 195.220.9.80, 2001:660:4302:1187::80). Update the glue at your registrar.

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.

SPF · SPF record needs 6 DNS lookups (limit is 10). Problems found: include:spf.mailing.crous-rouen.fr 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 · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

DMARC · DMARC policy only applies to 20% of failing mail (pct=20). Raise pct to 100 once you are confident in your setup.

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 · 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.