spf-discuss
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Re: Summary: Current state of SPF

2004-01-29 09:57:20
wayne wrote:

In <40192CAF(_dot_)8010401(_at_)phase(_dot_)org> Wechsler 
<wechsler(_at_)phase(_dot_)org> writes:

Extensibility:

* http://spf.pobox.com/mechanisms.html states that third party
* mechanisms and modifiers are permitted.


I think that web page is out of date, ambigous and wasn't even brought
up to date with the "frozen" spec that came out in Dec.

As far as I can see my above statement and comments about undefined mods and mechs are valid to the spec:

http://spf.pobox.com/draft-mengwong-spf.02.9.5.txt

3.2 Checking Declarations
Unknown mechanisms cause processing to abort with the result "unknown". Unknown modifiers are ignored by clients.

3.6 Unrecognized Mechanisms and Modifiers

   This draft defines only two modifiers, Redirect and Exp.
   SPF clients MUST support them both.

   Future extensions to this standard may introduce new mechanisms and
   modifiers.

   Unrecognized mechanisms cause processing to abort: if an SPF client
   encounters a mechanism which it does not understand or which it
   cannot properly evaluate (due perhaps to insufficient information
   about the mail message), then it terminates processing and returns
   "unknown".

   For example, if a mechanism requires fields from the message header
   but the SPF client application doesn't have access to the message
   header, then SPF client must terminate with a result of "unknown".

   Unrecognized modifiers are ignored: if an SPF client encounters
   modifiers which it does not recognize, it MUST ignore them and
   continue processing.


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