postmates.com

Delegation · The nameservers at the parent and in the zone should be the same. Only at the parent: dns1.p04.nsone.net, dns2.p04.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.net. dns1.p04.nsone.net, dns2.p04.nsone.net, dns3.p04.nsone.net, dns4.p04.nsone.net report NS dns1.p04.nsone.net dns2.p04.nsone.net dns3.p04.nsone.net dns4.p04.nsone.net. edns126.ultradns.biz, edns126.ultradns.com, edns126.ultradns.net, edns126.ultradns.org report NS edns126.ultradns.biz edns126.ultradns.com edns126.ultradns.net edns126.ultradns.org.

SOA · The nameservers serve different versions of the zone: 1651869032 on dns1.p04.nsone.net (198.51.44.4), dns1.p04.nsone.net (2620:4d:4000:6259:7:4:0:1), dns2.p04.nsone.net (198.51.45.4), dns2.p04.nsone.net (2a00:edc0:6259:7:4::2), dns3.p04.nsone.net (198.51.44.68), dns3.p04.nsone.net (2620:4d:4000:6259:7:4:0:3), dns4.p04.nsone.net (198.51.45.68), dns4.p04.nsone.net (2a00:edc0:6259:7:4::4); 2021020493 on edns126.ultradns.biz (204.74.67.126), edns126.ultradns.biz (2610:a1:1015::27e), edns126.ultradns.com (204.74.66.126), edns126.ultradns.com (2001:502:f3ff::27e), edns126.ultradns.net (204.74.110.126), edns126.ultradns.net (2610:a1:1014::27e), edns126.ultradns.org (204.74.111.126), edns126.ultradns.org (2001:502:4612::27e). 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.

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.

MX · Found 7 MX records, which is more than the recommended maximum of 5. Too many MX records may indicate a misconfiguration.

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