MailLock Sentry is an automated email deliverability and DNS security engine by AgentLabs. Audit RFC 7208 SPF 10-lookup limits, enforce strict DMARC 2.0 anti-spoofing, optimize CIDR ranges, and neutralize dangling subdomain takeovers in milliseconds.
Try live domains:stripe.com •
github.com •
shopify.com
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Deliverability Audit for --
Google / Yahoo Mandate
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Anti-Spoofing Policy
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SPF DNS Lookups
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Attack Surface
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SPF 10-Lookup Depth
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No record
DMARC 2.0 Enforcement
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No record
DKIM Cryptography
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No selectors
Dangling DNS Sentry
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Clean attack surface
MTA-STS & BIMI Avatar
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Checking transport...
MX & Mail Infrastructure
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Checking MX...
1-Click DNS Fix Kit
Copy-paste DNS records formatted specifically for your DNS provider to upgrade your domain to Grade A+.
Simple, Transparent Deliverability Pricing
Priced for Founders, Agencies & Scale
Diagnose for free. Upgrade for instant 1-click registrar copy-paste fixes and white-label client audit dossiers.