paychex.com

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-21.akam.net: "41824.8"; a12-65.akam.net: "48878.31"; a12-65.akam.net: "48878.32"; a16-64.akam.net: "48878.31"; a16-64.akam.net: "48878.27"; a2-64.akam.net: "48878.32"; a2-64.akam.net: "48878.26"; a7-66.akam.net: "41824.11"; a7-66.akam.net: "41824.4"; a9-64.akam.net: "41824.11"; a9-64.akam.net: "41824.9". Hide or replace the version string.

SOA · refresh 5m is outside 20m–1d. Current values: refresh 5m, retry 3m, expire 7d, negative TTL 5m.

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 (30s), NS (0s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 0s; resolvers may use either.

SPF · The ptr mechanism in SPF records is deprecated due to performance issues and should be avoided.

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-0018d001.gslb.pphosted.com, mxb-0018d001.gslb.pphosted.com

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits), 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.