Email Deliverability & Authoritative DNS Auditor. SPF, 2048-Bit DKIM, DMARC & Multi-Corridor Nameserver Verification.

Evaluate your domain’s SPF 10-lookup ceiling, DKIM key strength, DMARC enforcement policy (p=none vs p=quarantine / p=reject), and nameserver geographic diversity.

Since Google and Yahoo enforced strict bulk-sender authentication requirements, a single broken SPF include or missing rDNS/PTR record can route your company’s invoices and proposals straight to spam.

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Domain & Mail Authentication Parameters

Corporate Domain Name

SPF Record terminates with strict -all (Hard Fail) and ≤ 10 DNS lookups2048-bit RSA DKIM cryptographic signing active on outbound MTADecoupled MX Gateway (mail server does NOT share IP with public website)Multi-Node Authoritative BIND Nameservers (US East & US West Corridors)

DMARC Policy Enforcement Level:

AUTHENTICATION & DELIVERABILITY SCORE

96 / 100

; Authoritative 60s HA BIND Zone Blueprint for example-enterprise.com
$ORIGIN example-enterprise.com.
$TTL 60
@   IN  NS  ns20.greentreehosting.net.
@   IN  NS  ns30.greentreehosting.net.
@   IN  NS  ns40.greentreehosting.net.
@   IN  MX  10 mx.greentreemail.com.
@   IN  TXT "v=spf1 include:spf.greentreemail.com -all"
_dmarc IN TXT "v=DMARC1; p=quarantine; rua=mailto:dmarc@example-enterprise.com; pct=100"