DNS Record Checker
Enter your domain and DNS records below. We'll verify your email authentication is configured correctly for warm-up.
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Sales.co verifies and guides DNS setup for every domain before warm-up begins.
Set Up with Sales.co →Why DNS Records Matter for Warm-Up
SPF, DKIM, and DMARC are the three pillars of email authentication. Without all three configured correctly, inbox providers will reject or spam-folder your messages regardless of how carefully you warm up. Domains missing any authentication record see 52% lower inbox placement on average. In 2026, both Google and Microsoft require all three records for full sender reputation credit.