sanofi.com

Delegation · The addresses at the parent (glue) differ from the addresses in the zone: ns1.sanofi-synthelabo.com (glue 205.251.198.127, zone 205.251.198.127, 2600:9000:5306:7f00::1); ns2.sanofi-synthelabo.com (glue 205.251.196.144, zone 205.251.196.144, 2600:9000:5304:9000::1); ns3.sanofi-synthelabo.com (glue 205.251.193.224, zone 205.251.193.224, 2600:9000:5301:e000::1); ns4.sanofi-synthelabo.com (glue 205.251.194.58, zone 205.251.194.58, 2600:9000:5302:3a00::1). 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.

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

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: mail (1024 bits), selector1 (1024 bits). Rotate to a 2048-bit key.

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.