I think you hit the nail on the head. Some common way for the recipient to
know which of (CSV, SPF, DomainKeys, etc, etc) is available would be nice.
Otherwise, the recipient is left "hunting", ie, searching all places it
knows about, on DNS or wherever.
What MIME types does a recipient support?
What servers does a target host support?
With extremely few exceptions, Internet mechanisms do not support a
test-before-using model.
d/
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Dave Crocker
Brandenburg InternetWorking
+1.408.246.8253
dcrocker a t ...
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