insider.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, dns4.p03.nsone.net; only in the zone: dns1.p04.nsone.net, dns2.p04.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.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.p03.nsone.net, dns4.p04.nsone.net report NS dns1.p04.nsone.net dns2.p04.nsone.net dns3.p04.nsone.net dns4.p04.nsone.net ns11.constellix.com ns21.constellix.com ns31.constellix.com ns41.constellix.net ns51.constellix.net ns61.constellix.net.

SOA · The nameservers serve different versions of the zone: 1646154696 on dns1.p03.nsone.net (198.51.44.3), dns1.p03.nsone.net (2620:4d:4000:6259:7:3:0:1), dns1.p04.nsone.net (198.51.44.4), dns1.p04.nsone.net (2620:4d:4000:6259:7:4:0:1), dns2.p03.nsone.net (198.51.45.3), dns2.p03.nsone.net (2a00:edc0:6259:7:3::2), dns2.p04.nsone.net (198.51.45.4), dns2.p04.nsone.net (2a00:edc0:6259:7:4::2), dns3.p03.nsone.net (198.51.44.67), dns3.p03.nsone.net (2620:4d:4000:6259:7:3:0:3), dns3.p04.nsone.net (198.51.44.68), dns3.p04.nsone.net (2620:4d:4000:6259:7:4:0:3), dns4.p03.nsone.net (198.51.45.67), dns4.p03.nsone.net (2a00:edc0:6259:7:3::4), dns4.p04.nsone.net (198.51.45.68), dns4.p04.nsone.net (2a00:edc0:6259:7:4::4); 2015010239 on ns11.constellix.com (96.45.80.1), ns11.constellix.com (2600:180a:1001::1), ns21.constellix.com (46.31.236.1), ns21.constellix.com (2600:180b:2001::1), ns31.constellix.com (43.247.170.1), ns31.constellix.com (2600:180c:3001::1), ns41.constellix.net (96.45.81.1), ns41.constellix.net (2600:180a:4001::1), ns51.constellix.net (46.31.237.1), ns51.constellix.net (2600:180b:5001::1), ns61.constellix.net (43.247.171.1), ns61.constellix.net (2600:180c:6001::1). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

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.

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.