Re: [Nmh-workers] Changes to post

[Lyndon Nerenberg]

On 2012-03-12, at 9:05 AM, Lyndon Nerenberg wrote:

> Since these headers will be specific to the backend transport I would suggest 
> ignoring ones unknown to the backend, and giving the backend the ability to 
> print warnings, or abort the send, if there are problems processing a 
> recognized directive.

The sender should also be able to specify the message not be sent if a 
meta-directive cannot be honoured.  E.g. trying to specify deliver-by when 
using the sendmail transport. Changing <directive> to:

  directive = LETTER *(LETTER / DIGIT / "-") *("!")

would make

  .deliver-by 86400 N

a request, and

  .deliver-by! 86400 N

a demand.

--lyndon