Email Security & Deliverability Audit API

One API call returns 13 checks — SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, blacklists, and more — plus a 0–100 score, letter grade, and a deliverability verdict you can show a customer.

    MailSec API

    Built for teams that manage email security

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    MSP & Enterprise Audits

    Audit customer domains at scale. Run bulk checks across your client portfolio and surface misconfigurations before they become incidents.

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    SaaS Onboarding Validation

    Automatically validate customer email posture. Verify SPF, DKIM, and DMARC during onboarding to ensure deliverability from day one.

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    Security Monitoring

    Detect spoofing exposure and configuration drift. Schedule periodic audits and alert when domain protection degrades.

    Full Domain Audit & Scoring

    Audit any domain with a single request. Get a 0-100 security score, A-F letter grade, and a deliverability verdict (READY / CAUTION / BLOCKED) — powered by live DNS lookups with TTL-aware caching.

    • SPF, DKIM, DMARC, DNSSEC, MX
    • Transparent point breakdown
    • Bulk audit up to 10 domains
    • Fresh lookups, no stale data
    Get API Key

    Beyond the Basics

    Go further than SPF/DKIM/DMARC. Check MTA-STS enforcement, TLS-RPT reporting, BIMI brand logos, Spamhaus blacklist status, disposable domain detection, and email validation — all from one API.

    • MTA-STS & TLS-RPT checks
    • BIMI logo & VMC detection
    • Spamhaus DBL & ZEN blacklist
    • 100k+ disposable domain list
    View Documentation

    Replace your multi-tab audit workflow

    Stop juggling dig, whois, and mxtoolbox. One call returns everything you'd need three tools to gather. Free for the first 1,000 domains.

    Replace your multi-tab audit workflow