Free deliverability tools
Audit your domain in seconds. Run real DNS lookups on SPF, DKIM, DMARC, MX, blacklists and verify email addresses — no signup required.
SPF Checker
Validate Sender Policy Framework records.
Open toolDKIM Checker
Check DKIM signing keys on any selector.
Open toolDMARC Checker
Inspect DMARC policy, alignment, reporting.
Open toolMX Record Lookup
See mail servers and identify the provider.
Open toolBlacklist Checker
Scan an IP or domain across 10+ DNSBLs.
Open toolEmail Verifier
Syntax, MX, disposable + role detection.
Open toolDomain Reputation
Composite 0–100 deliverability score for any domain.
Open toolSpam Analyzer
Score your subject and body for spam-filter risk.
Open toolSubject Line Generator
20+ proven cold email subject lines, instantly.
Open toolSignature Generator
Deliverability-safe HTML email signature in seconds.
Open tool