sieve vacation draft, :mime

Hi,

The sieve vacation draft doesn't say as much about :mime as it should. 
IMO, it should specify precisely which header fields must, may and must 
not be included in the :mime response.
I suggest that
  a) content-type MUST be included (since if it's not included, what's 
the point of :mime?)
  b) content-transfer-encoding MAY be included, and if it's not 
included, the c-t-e is 7bit
  c) header fields defined in 2822 MUST NOT be included (e.g. received, 
to, subject)
  d) other header fields MAY be included (e.g. x-loop, x-message-flag, 
content-disposition)
Arnt