[mail-vet-discuss] Preview of draft-09

[Scott Kitterman]

On Mon, 05 Nov 2007 11:14:49 -0800 "Murray S. Kucherawy" <msk at sendmail.com> 
wrote:
>SM wrote:
>> If this memo replaces the Received-SPF header, then it changes the 
>> requirements on an existing protocol.
>SPF is an experimental protocol.  Thus, I'm not sure this is a big 
>deal.  Anyone else want to weigh in?

Yes.  SPF is an ongoing open source project with ongoing development.  
There are multiple implementations that support the current Received-SPF 
header field.  I'm personally a maintainer on two applications and one 
library that would be impacted.

Experimental or not, it is a deployed protocol and Received-SPF is part of 
it. 

It would be sensible, I think for now, to define SPF support here as an 
optional addition or adjunct to the protocol defined in RFC 4408.  Once a 
multi-method standardized header field exists (as defined here), it's use 
could be part of the transition from experimental to something else.

Scott K