Mail Security & Deliverability Checker

Free online tools to test SPF, DKIM, DMARC, MX records, DNS blacklists, reverse DNS and SMTP/STARTTLS. Run a one-click Mail Security Check, get a 0–10 score with per-record findings and download a shareable PDF report.

Mail Security Anti-Spoof Inbound Health MX SPF DMARC DKIM DNS PTR Blacklist SMTP Relay WHOIS Headers

DMARC for gmail.com WARN

v=DMARC1; p=none; sp=quarantine; rua=mailto:[email protected]
vDMARC1
pnone
spquarantine
ruamailto:[email protected]
Fix:Move from p=none to p=quarantine (and later p=reject) once aligned.