[dkim-dev] SSP2 implementation

[Douglas Otis]

On Sat, 2006-09-02 at 22:19 +0300, Mircea Purdea wrote:
> In light of the newly published 'draft-allman-dkim-ssp-02', I'm curious 
> to hear what plans the rest of you guys have regarding implementation.
> 
> I admit I haven't had time to fully digest it yet, but the thing that 
> struck me immediately is the introduction of the new DKIMP DNS RR; this 
> might 'for most intents' be a 'dedicated TXT RR', but fact is, just 
> adding a TXT RR with DKIMP syntax does not make a DKIMP RR (does it?).

This must be assigned a specific RR number or it will conflict with
other TXT RR that might exist withing that namespace as there is no
label prefix.  This helps with a search algorithm.
 
> So, deployment of SSP2 actually requires the modification of existing 
> DNS servers and resolvers, doesn't it?

Implementation at the MTA should not be an issue as *nix DNS et al
handle new RR types.

There may be issues related to accessing new RR types by servers and MUA
clients within a Windows environment.  Are there any observed problems? 

There may be issues related to Exchange servers adding From header
fix-ups with <>.  The From header fix-up can be somewhat problematic for
other MUA clients as well.  Are there any observed problems?

The similar issue may exist for the Content-Type header.  

-Doug