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MailSec – Free email security audit API (one curl, eight checks)

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Free Email Security Check - MailSec API Playground<br>Try MailSec<br>Enter any domain and get an instant email security audit. Check SPF, DKIM, DMARC, DNSSEC, MX, blacklists, and more -- powered by the MailSec API.

Check

Free demo -- no API key needed. Limited to 5 checks per minute per IP.

Replace your multi-tab audit workflow<br>Stop juggling dig, whois, and mxtoolbox. One API call returns everything — SPF, DKIM, DMARC, DNSSEC, MX, blacklists, and a deliverability verdict. Free tier included.

Get Started Free

free mailsec email security audit check

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