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Email Deliverability Test - SPF/DMARC/DKIM Check
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Email Deliverability & Authentication Check
Comprehensive email security audit: MX records, SPF validation, DMARC policy, DKIM detection (15 common selectors), BIMI, MTA-STS, TLS-RPT, and DANE/TLSA. Blacklist checks query multiple DNSBLs across all MX hosts. Results include a 0-100 deliverability score with severity-rated diagnostics explaining exactly why emails might land in spam.
How It Works
The tool queries MX records, then validates SPF, DMARC, and DKIM by fetching the corresponding TXT/CNAME records. Advanced checks probe for BIMI, MTA-STS, TLS-RPT, and DANE/TLSA. Each MX host IP is checked against multiple DNSBL blacklists. All findings are combined into a weighted 0-100 score.
FAQ
Why are my emails going to spam?
Common causes: missing or misconfigured SPF record (senders not authorized), no DMARC policy (no enforcement instruction), failed DKIM signature (message altered in transit), or IP listed on a DNSBL blacklist. This tool checks all four and scores your configuration.
What is the difference between SPF, DKIM, and DMARC?
SPF specifies which servers may send email for your domain (IP-based). DKIM adds a cryptographic signature to each message proving it wasn't altered. DMARC ties SPF and DKIM together with a policy telling receivers what to do when checks fail (none/quarantine/reject).
What score should I aim for?
A score of 80+ indicates good email hygiene. Below 60 means significant issues exist that likely cause deliverability problems. Key requirements for a high score: valid SPF with strict -all, DMARC with quarantine/reject policy, working DKIM, no blacklist entries, and a valid PTR record on your mail server IP.
Tool Features
Related Guides
Coming Soon Email deliverability auto-monitoring — monitoring feature coming soon.