Humerly
Free email tools — SPF, DKIM, DMARC
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Humerly - Free email tools — SPF, DKIM, DMARC

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"A collection of 5 free email deliverability tools to diagnose and fix common email setup problems. Includes: Email Setup Audit (full DNS check), SPF Checker, DMARC Checker, Postmaster Check (MX/SSL/TLS), and Email Risk Scan (spam risk assessment). All tools are free, require no signup, and give actionable fixes."

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"We built these tools because we kept fixing the same email deliverability issues for clients — broken SPF, missing DMARC, misconfigured MX. Instead of running the same checks manually every time, we turned them into free tools so anyone can diagnose their email setup in seconds. No signup, no paywall — just paste a domain and get a fix plan."