tableau.com

Delegation · The nameservers at the parent and in the zone should be the same. Only at the parent: dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net; only in the zone: dns1.p04.nsone.net, dns2.p04.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.net, ns04.shapesandcolors.net. dns1.p03.nsone.net, dns1.p04.nsone.net, dns2.p03.nsone.net, dns2.p04.nsone.net, dns3.p03.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.net, ns01.shapesandcolors.net, ns02.shapesandcolors.net, ns03.shapesandcolors.net, ns04.shapesandcolors.net report NS dns1.p04.nsone.net dns2.p04.nsone.net dns3.p04.nsone.net dns4.p04.nsone.net ns01.shapesandcolors.net ns02.shapesandcolors.net ns03.shapesandcolors.net ns04.shapesandcolors.net.

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.

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: mxa-00177002.gslb.pphosted.com, mxb-00177002.gslb.pphosted.com, mx0a-00177002.pphosted.com, mx0b-00177002.pphosted.com

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: s2 (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.