okta.com

SOA · The nameservers serve different versions of the zone: 1664 on ns-1459.awsdns-54.org (205.251.197.179), ns-1459.awsdns-54.org (2600:9000:5305:b300::1), ns-1563.awsdns-03.co.uk (205.251.198.27), ns-1563.awsdns-03.co.uk (2600:9000:5306:1b00::1), ns-285.awsdns-35.com (205.251.193.29), ns-285.awsdns-35.com (2600:9000:5301:1d00::1), ns-684.awsdns-21.net (205.251.194.172), ns-684.awsdns-21.net (2600:9000:5302:ac00::1); 2 on ns-cloud-a1.googledomains.com (216.239.32.106), ns-cloud-a1.googledomains.com (2001:4860:4802:32::6a), ns-cloud-a2.googledomains.com (216.239.34.106), ns-cloud-a2.googledomains.com (2001:4860:4802:34::6a), ns-cloud-a3.googledomains.com (216.239.36.106), ns-cloud-a3.googledomains.com (2001:4860:4802:36::6a), ns-cloud-a4.googledomains.com (216.239.38.106), ns-cloud-a4.googledomains.com (2001:4860:4802:38::6a). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

SOA · negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1h, retry 10m, expire 7d, negative TTL 1m.

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 (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 5m; resolvers may use either.

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-00553301.gslb.pphosted.com, mxb-00553301.gslb.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.

BIMI · The logo is published without a Verified Mark Certificate. Gmail and Apple Mail only show BIMI logos with a VMC or CMC; Yahoo shows it without one.