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
5.2
of 10

Anti-Spoofing Audit · gmail.com

Risk: Medium Some protections are in place, but spoofers can still slip through.
Reporting only — spoofers are observed but not blocked. Move p to quarantine/reject.
SPF (weight 3) Must end with -all
WARN · 1/2
v=spf1 redirect=_spf.google.com
  • SPF record is present.
  • No "all" mechanism — SPF is incomplete.
Fix:End your SPF with "-all" and keep DNS lookups ≤ 10.
DMARC (weight 5) Must enforce p=reject
WARN · 2.2/3
v=DMARC1; p=none; sp=quarantine; rua=mailto:[email protected]
vDMARC1
pnone
spquarantine
ruamailto:[email protected]
  • DMARC record is present.
  • Policy p=none — monitoring only, no enforcement.
  • Aggregate reporting (rua) configured.
  • Explicit subdomain policy sp=quarantine.
Fix:Move from p=none to p=quarantine (and later p=reject) once aligned.
DKIM (weight 2) Active signing key
FAIL · 0/2
  • No DKIM record found from common selectors. Outgoing mail cannot be cryptographically signed.
  • Note: DKIM uses custom selectors — your provider may use a non-standard name.
Fix:Ask your mail provider for the DKIM selector and public key, then publish it as TXT <selector>._domainkey.gmail.com