Re: [dkim-milter-discuss] failed to verify for missing body message using simple canonicalization

[Scott K. <iet...@ki...>]

On Tuesday 20 November 2007 15:16, Murray S. Kucherawy wrote:
> On Tue, 20 Nov 2007, Janet N wrote:
> > How do I enable DKIM Filter to ignore the Body message if it is missing?
> >
> > I've sent an email with a missing Body message and it failed to verify.
> > I am running DKIM Filter v2.2.0 with Canonicalization relaxed/relaxed.
> >
> > I've tried switching the Canonicalization to simple, but DKIM still
> > expect a body message :(
>
> The filter will accept a message with an empty body without difficulty.
>
> The message should verify against any autoresponder with "relaxed" body
> canonicalization, but we had a bug in libdkim so the "simple" body case
> was not interoperable.  This is fixed in 2.4.0 (now in Beta).  However,
> the "simple" case should verify the same way against our own autoresponder
> since the flaw is symmetric.
>
> If you are sending empty messages and getting verification failures, it
> could be that an intermediate MTA is adding a blank line to the null
> message body.  That's just a guess though.
>
The DKIM RFC is ambiguous in how empty message bodies are to be dealt with.  
Hopefully the concensus view at the DKIM interop event will prevail and these 
transient issues will fade soon.

Scott K