Try MailSec

Enter any domain and get an instant email security audit. Check SPF, DKIM, DMARC, DNSSEC, MX, blacklists, and more -- powered by the MailSec API.

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

Replace your multi-tab audit workflow

Stop juggling dig, whois, and mxtoolbox. One API call returns everything — SPF, DKIM, DMARC, DNSSEC, MX, blacklists, and a deliverability verdict. Free tier included.

Replace your multi-tab audit workflow