Hello.
Sometimes to me letters in such charsets come. No, I don't correspond with Chinese or Koreans. But someone writes on cyrillic using these charsets.
These codings, as well as UTF-8, allow to mix characters of different national alphabets, including Latin and cyrillic in the letter.
Some e-mail clients work with this coding normally.
As far as I can judge, RC 1.1.4 doesn't support these codings.
Whether there is a support of these codings in the latest version of RC?
Whether it is planned to add it to next versions?
Most likely, I should add it to RC 1.1.4 urgently. I will be grateful if to me help to find places where different codings for a letter body, both HTML, and the text are processed. I found processing of codings in titles recently.
If it is interesting to someone, I am ready to transfer results of this work.