----- Original Message -----
From: "Tony Hansen" <tony(_at_)att(_dot_)com>
To: "IETF DKIM WG" <ietf-dkim(_at_)mipassoc(_dot_)org>
Sent: Tuesday, November 08, 2005 2:10 AM
Subject: Re: [ietf-dkim] Change the SSP o= to use words, break out 3rd
party?
Throwing ^/user in the column with sending mail, and removing the
combinations I think should probably be disallowed, you have the
following table of possible policies:
sending mail signature 3rd party current
1 allowed unspecified unspecified NONE
2 allowed never never
3 allowed never allowed
4 allowed optional never ?/WEAK
5 allowed optional allowed ~/NEUTRAL
6 allowed always never !/EXCLUSIVE
7 allowed always allowed -/STRONG
8 never ./NEVER
9 user ^/USER
I think based on people's concern for restrictive policies, we might need
additional for OA that helps define the 3PS policy.
For 3PS, we have Never, Allowed (optional). I think we might need a APPEND,
RESIGN and IGNORE policy in there.
This will help alleviate issues where an OA EXCLUSIVE policy is used on
extermal mail services.
So something like (using your notation)
signature=always, 3PS=IGNORE -- Keep Original, don't strip, resign
signature=always, 3PS=APPEND -- Append, don't strip or replace.
signature=always, 3PS=RESIGN -- strip and replace.
I'm just winging it, but the idea is to keep restrictive policies flowing
when it goes thru a mail service.
--
Hector Santos, Santronics Software, Inc.
http://www.santronics.com
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