DKIM Deployment

[Dave CROCKER <>]

On 1/13/2010 4:27 PM, Jim Fenton wrote:
> > 1. changing the case of header names
> > e.g. s/Message\-ID/Message\-id/
> >
> > #2. changing the value of the Content-type header
> > # s/charset=us\-ascii/CHARSET=US\-ASCII/
> > # this one might be due to a misconfiguration
>
> These are both pretty silly -- changing the case of case-insensitive
> values.

Actually, what's silly is having an algorithm that /cares/ about case, for a 
case-insensitive string...

It is not uncommon for systems to internally store structured data in an 
internal, canonical form and then re-generate its external encoding.  That often 
leads to this sort of end-to-end change.


> > 3. reformatting the Date header
>
> Shouldn't this really be a user agent function?

Same answer as above.


> I'm not familiar with this product -- is this like Microsoft Exchange,
> something that is used to manage messages within a domain, with SMTP to
> receive and send messages from/to the outside world? If so, it should

No.  It's an evolution of a product that's been in commercial use for 25 years 
(Innosoft) and derives from software used for CSNet, in 1980 (MMDF).  That's 30 
years of experience and evolution.

Like Sendmail, but cleaner...

d/
--

  Dave Crocker
  Brandenburg InternetWorking
  bbiw.net