spf-discuss
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Re: Pure ESMTP alternative

2003-11-24 12:02:08
On Monday 24 November 2003 5:52 pm, Justin Mason wrote:
See http://web-o-trust.org/ for a sample that works entirely orthogonally
- -- running over HTTP, using flat files on web servers as a data store, and
it just comes up with lists of IP addresses that you can query through
DNSbl lookups.

Interesting project. It looks like an antispam whitelist-building scheme 
rather than a sender authorization scheme though. 

The point being that it may well reign-in overzealous antispam blacklists, but 
it does not guarantee the rightful origin of a particular item of mail beyond 
'subsequent meatspace consequences' like losing your friends/your bond/going 
to jail/thugs turning up at your doorstep. A sender authorization scheme 
should implement prior restraint in the sense of rejecting joe-jobs in the 
first place.

Also it does not appear to have an inbuilt obsolescence path to a world where 
each domain owner publishes which servers are authorized to send mail from 
their own domain. 

A web of trust would not be neccessary in an SPF world, but could be of help 
getting there if done in a way that does not 'institutionalize itself'.

- Dan


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