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Re: What to do about redirect= and NXDOMAIN?

2005-05-20 17:52:11
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Stuart D. Gathman wrote:
[...]

Most of what Stuart said here I have already commented in another message 
of mine.

While previous specs said PermErr MUST be treated as None, I have
taken receiver policy in the sender policy spec with a grain of salt.

Indeed.

IMO, the Sender Policy spec should use 'MAY' and 'SHOULD' when
recommending receiver policy.

No.  RFC 2119 keyword language should only be used for defining the meaning 
of _sender_ policy, particularly including the exact meaning of the result 
codes, possibly in relation to each other ("The 'Foo' result has a 
slightly different meaning than 'Bar', but SHOULD be treated the same.")

But it should _not_ be used to absolutely suggest, recommend, or prescribe 
_receiver_ policy.  It is not required for a uniform interpretation of 
sender policies, and it also is pointless because receivers will not 
adhere to it (and why should they?).
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