Why did that email bounce?
Paste the headers of a bounced or spam-foldered message and we run the same verdict engine our product uses on real bounces: did it fail authentication, was it a forwarder mangling the message, a reputation problem, or the receiver’s own policy? You get the cause in plain English, with the evidence and what we ruled out.
In Gmail: open the message, three-dot menu, “Show original”, copy everything. In Outlook: “View message source”. Headers only, never the body, and we don't store what you paste.
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In the product you forward the whole bounce by email: the verdict is joined with your DMARC reports and blocklists, the fix is one click, and we watch recovery. Free for one domain.