This is a WebFist server. See the introduction & overview blog post and the source at github.com/bradfitz/webfist. You can run your own WebFist server and join the fist-bump network. Use WebFist servers to do WebFinger look-ups when the canonical reply (from the domain that owns an email address) is invalid or missing.
Send email to email@example.com to set your WebFinger delegation. The email must be DKIM-signed. You will not receive a response email. The contents of the email should be like this. The URL you point to should be a JRD document defined by the WebFinger spec.
webfist = http://example.com/path/to/your-profile
Lookup your email address using WebFist:
Or, send yourself an email and paste the full email headers and body here:[Recent changes]