Curretntly new messages have a default charset and if not all characters fit into it, I get a warning and have to select charset manually. It would be nice, if I could specify a *list* of charsets to try anf the message send would pick the first that contains all the message symbols and only warn if none of charsets fit. P.S. My own preference would be "us-ascii, iso-8859-1, koi8-r, utf-8". I want 7-bit messages to be marked as such, I want 8859-1 messages marked as such, I want Mozilla to automatically detect if I typed a Russian message that can be sent in KOI8-R and I want Mozilla to just use Unicode if everything else fails (or may be not - I'd really like this to be configurable).

Naoki, do you want to take care of this request?

That is for advanced users only (most users have no idea about charset), so no UI is needed. The charset fallback backend is already available. user_pref("intl.fallbackCharsetList.ISO-8859-1", "KOI8-R", "UTF-8");

I've set user_pref("mailnews.send_default_charset", "us-ascii"); user_pref("intl.fallbackCharsetList.us-ascii", "ISO-8859-1, KOI8-R, UTF-8"); and it seems to work (except that the pref UI does not really consider "us-ascii" to be a valid choice for the default send charset, but that's OK). I just wich there was some document listing all the hidden prefs...

=> WFM per reporter's comment 3.

This WFM _after_ I manually add a custom user_pref. However I do not want to have to do this for all my friends and relatives who complain to me about this issue. IMHO at the very minimum there should be a "fall back to UTF-* when necessary" option.

(In reply to comment #5) > This WFM _after_ I manually add a custom user_pref. However I do not want to > have to do this for all my friends and relatives who complain to me about this > issue. IMHO at the very minimum there should be a "fall back to UTF-* when > necessary" option. bug 410333. duping.