Email Deliverability Checker
Scan SPF, DMARC, key headers, and blacklist status in seconds.
Free scan · Read-only · No signup required
What this checks
- SPF record presence, syntax, and lookup count
- DMARC record and policy (none, quarantine, reject)
- List-Unsubscribe and one-click unsubscribe support
- Blacklist status for your mail server IPs
Why deliverability breaks silently
DNS and policy changes can happen without notice. A record that passed yesterday might fail today, or your mail server IPs can appear on a blacklist. Running a scan gives you a point-in-time view; monitoring alerts you when something changes so you can fix it before it affects inbox placement.
FAQ
What does the deliverability scan check?
We check SPF and DMARC records, key headers (e.g. List-Unsubscribe), and whether your mail server IPs appear on major blacklists. The scan is read-only and doesn't send email or modify DNS.
Do I need to sign up?
No. You can run a free scan without an account. Signing up lets you add domains for ongoing monitoring and email alerts when something changes.
Why did my scan show pass but I'm still in spam?
SPF and DMARC confirm authentication and policy. Inbox placement also depends on reputation, blacklist status, and content. Use the blacklist check and monitoring to catch issues that appear after configuration changes.
Is the scan safe?
Yes. We only read public DNS and report what we find. We never send email on your behalf or change your DNS.