sltrib.com

Delegation · The nameservers at the parent and in the zone should be the same. Only in the zone: ns3.xmission.com. ns.xmission.com, ns1.xmission.com, ns2.xmission.com, ns3.xmission.com report NS ns.xmission.com ns1.xmission.com ns2.xmission.com ns3.xmission.com.

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns.xmission.com: "9.18.30-0ubuntu0.24.04.1-Ubuntu"; ns1.xmission.com: "9.18.30-0ubuntu0.22.04.2-Ubuntu"; ns2.xmission.com: "9.18.18-0ubuntu0.22.04.2-Ubuntu"; ns3.xmission.com: "9.20.30-1~deb13u1-Debian". Hide or replace the version string.

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.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: k1 (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.