On Sat, Jan 24, 2004 at 01:42:43AM -0500, Meng Weng Wong wrote:
|
| "Unknown" is strictly defined: a client must proceed as though the
| domain did not publish SPF records. Usually, this means giving the
| message the benefit of the doubt, even if that means additional content
| filtering.
|
| Distinguishing "none" from "unknown" encourages clients to treat
| "unknown" as "fail". If too many clients make this judgement, the
| integrity of the projhect would be threatened. That is why I felt it
| was important to omit the "none" return code. If it turns out I was
| wrong, we can change this in spf v2.
|
But if we bring back softfail (~all) we can add "none" as well with less
fear of the above!
I always did feel I was over hasty in taking out softfail. I think AOL
would be using that right now if that was there, and we'd be able to
gather much better data that way.
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