Free tool
Domain health checker.
Enter a domain to run a comprehensive check: SPF, DKIM, DMARC, MX, and DNS health.
What we check
SPF, DKIM, DMARC, MX records, and DNS resolution. These are the foundation of email deliverability.
Why it matters
A missing record can tank your deliverability. Fix issues before launching campaigns.
What to fix first
Start with SPF, then DKIM, then DMARC. MX is only needed if you receive replies.