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Email header analyzer

Read delivery hops, reported authentication and DKIM selectors. Your headers stay in your browser.

In your email app, choose “Show original”, “View source” or “View headers”. Paste only the headers above the first blank line. Analysis runs in your browser; this tool does not upload or save your headers.

Email on your domain. $9/year.

Unlimited users and domains, with 10 GB pooled storage. Bring your own domain and pay for the storage you need.

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