Oops forgot a few remarks.
Axel Luttgens wrote:
I don't know whether dovecot-sieve is supposed to do the conversion automatically, but it is sure that an RFC822 header MUST be in US-ASCII (so as to be 7bit-clean). Sieve is supposed to do the conversion implicitly, yes.
The required encodings are described in: http://www.rfc-editor.org/rfc/rfc2047.txt For example, a subject header with the french word "Résistance" could be encoded as: Subject: =?iso-8859-1?Q?R=E9sistance?=
Could you try by inserting the encoded subject line directly in the config file and see what gives? Hmm, that should work (for now). This is not user friendly though.
On the other hand, perhaps does sieve provide the needed tools itself; someone?
Read my other post for the rest of the story.
Regards,
Stephan