-----Original Message-----
From: Hector Santos [mailto:spf-discuss(_at_)winserver(_dot_)com]
Sent: vrijdag 18 november 2005 19:47
To: spf-discuss(_at_)v2(_dot_)listbox(_dot_)com
Subject: Re: [spf-discuss] Re: Is best guess moronic?
IMV, this is the exactly the sort of activity the "SPF COUNCIL" is
sup- pose to be the watch dogs for.
You heard the hysteria... Now the facts from your SPF Council:
Mail::SPF::Query does NOT, by default, enable the 'best guess' mecha-
nism. Let me repeat that: NOT. And shouting real hard about it does
not make it so, either
Nor did I say it was or not. It doesn't matter either way.
The issue is that this non-standard feature CHANGES the meaning of a
standard SPF specification. It should not CHANGE the meaning of PASS. A
SPF NONE is a SPF NONE, not a SPF PASS.
Is this a difficult concept to grasp?
What is apparently too difficult to grasp -- for you, at least -- is that
'best-guess' does not change the meaning of PASS one iota: not in the
spec, because it is not even in the spec; and not otherwise, because
'best-guess', per local policy, just broadens the PASS window to a fixed,
'guessed' width = "a/24 mx/24 ptr". It does not change the meaning of PASS
at all. PASS still means PASS. 'best-guess' just assigns a fixed 'width'
to what can PASS.
I have personally never found cause to enable 'best-guess'. But it is in
the nature of receiver policy (the "Your MTA, you rules" adage) that
receivers can accept pretty much all mail they want.
And as for the Received-SPF header, the only confusion I can see happen,
is when people are misguided enough to think actual delivery decisions are
made upon the value of that header, instead of during the SMTP dialogue.
And if people read the Receiced-SPF header, and plainly see "Best Guess"
in that header, and still remain in their confusion, then consider that
perhaps their state of confusion is of a more permanent nature.
- Mark
System Administrator Asarian-host.org
---
"If you were supposed to understand it,
we wouldn't call it code." - FedEx
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