Email Health Tools

Free tools to check your domain health, sender reputation, and deliverability score.

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When to use these: Run all three before launching any major email campaign. MxToolbox catches DNS/auth issues, Postmaster shows how Gmail sees you, and Mail-Tester gives you a quick score with specific fixes.

MxToolbox Email Health

Comprehensive email health check. Tests SPF, DKIM, DMARC, blacklist status, DNS configuration, and identifies deliverability issues in one scan. Run this before any major campaign.

Open Tool

Google Postmaster Tools

Monitor your domain's reputation with Gmail specifically. Shows spam rate, IP reputation, domain reputation, authentication success rates, and encryption stats. Essential since Gmail is 40–60% of inboxes.

Open Tool

Mail-Tester

Send a test email and get a 1–10 deliverability score. Checks your message, server, sending IP, and provides specific fixes. Aim for 8/10 or higher before sending to your full list.

Open Tool