Maildun
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Test email delivery, monitor authentication, and investigate sender reputation

Hello Inbox provides tools for diagnosing email delivery problems and maintaining a sending setup. Users can test messages for authentication, content, and reputation issues, inspect inbox placement across supported providers, and monitor DMARC reports. Address verification and content checks help identify list or message problems before a campaign runs.
Sender profiles give the platform context about an organization's email services, with Google Postmaster Tools connections and alerts available for ongoing monitoring. An AI assistant helps interpret test results and suggest next steps based on that context. The service supports marketers managing recurring campaigns, but a favorable test does not guarantee inbox placement because recipient-provider decisions and sender behavior continue to affect delivery.
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