Free Tool · No signup required
Is your sending domain
actually configured right?
Paste your sending domain. We'll run a live SPF, DKIM, DMARC, and MX audit using Cloudflare DNS — and tell you exactly what to fix.
What we check
- · MX records (mail server config)
- · SPF (which servers can send for you)
- · DKIM (cryptographic signing — common selectors)
- · DMARC (policy + enforcement level)
Why it matters
Misconfigured SPF, DKIM, or DMARC is the #1 reason transactional and marketing email lands in spam. ISPs treat unauthenticated mail as suspicious — even from real senders. A 30-second audit catches what your ESP setup may have missed.
If the check comes back clean but mail still lands in spam
Authentication is only the first layer. When records align and placement is still bad, the problem is usually reputation or list quality — that diagnosis is what our inbox placement service covers. And if you're weighing infrastructure changes to fix it, read the honest take on when a dedicated IP helps and when it makes things worse.