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Check your domain's SPF, DKIM, DMARC, and MX records in one scan. Get a score and actionable fixes.
Enter a domain and click "Test deliverability" to check your email authentication.
Email deliverability depends on authentication (SPF, DKIM, DMARC), sender reputation (IP and domain), email content (spam triggers, formatting), list hygiene (bounce rates, engagement), and infrastructure (proper DNS records, valid MX servers). This tool checks the authentication and infrastructure factors, which are the foundation of good deliverability.
These are three complementary email authentication protocols. SPF specifies which servers can send email for your domain. DKIM adds a cryptographic signature to verify emails haven't been tampered with. DMARC ties them together by telling receiving servers what to do when emails fail SPF or DKIM checks. Together, they prove your emails are legitimate.
A score of 8–10 means your domain's authentication infrastructure is well-configured. 5–7 means you have the basics but are missing some protections. Below 5 means critical authentication is missing and your emails are likely hitting spam folders. Focus on getting SPF, DKIM, and DMARC all passing for the best results.
DNS changes typically propagate within 1–48 hours, though most changes are visible within 1–4 hours. The propagation time depends on the TTL (Time to Live) of your existing records and your DNS provider. After making changes, wait at least an hour before re-testing.
Unboxd reads every email and gives you a daily briefing with only what matters.