On Fri, 08 Apr 2011 19:55:09 +0100, Franck Martin <[email protected]> wrote:
> On 4/8/11 23:38 , "Charles Lindsey" <[email protected]> wrote: >> In practice, there are three usages which seem to be common; are there >> others? >> >> 1. FROM = Alice@whatever i=sales.example.com d=example.com >> >> 2. FROM = [email protected] [email protected] d=example.com >> >> 3. From = [email protected] [email protected] d=example.com. ..... >> So my inclination is to leave 'i=' there. ... > > This is outside the current DKIM spec, but from your example, we could > define 3 level of reputations for the domain d=example.com (I'll exclude > case 1. As I don't know yet what to do with it) > > Level 1) Alice > Level 2) sales or bob > Level 3) the whole domain example.com > > It is then possible to decide if we should block (or whitelist) all > emails > from alice, or all emails coming from sales (or bob) stream, or all > emails > signed by d=example.com I think you may have missed the point of my 'bob' example. It would have been clearer if I had said: 3. From = [email protected] [email protected] d=example.com. Where mallet is some disgruntled example.com employee posing as Alice. A human seeing that evidence (E.g. in an A-R header) might well conclude the message was bogus. But it would be hard for an automaton to spot it. -- Charles H. Lindsey ---------At Home, doing my own thing------------------------ Tel: +44 161 436 6131 Web: http://www.cs.man.ac.uk/~chl Email: [email protected] Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K. PGP: 2C15F1A9 Fingerprint: 73 6D C2 51 93 A0 01 E7 65 E8 64 7E 14 A4 AB A5 _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
