Character Set problem

[Chris]

Our user will receive Simplyfy Chinese (gb), Traditional Chinese (big5) and
English email everyday. But sqwebmail seems can't handle non-English
language very well.

the current en/CHARSET is iso-8859-1

under this setting All 8bit gb and big5 text email will NOT display
correctly.

if we change en/CHARSET from iso-8859-1 to big5

it will only Big5 and English email.

or this problem only happen on text email not HTML format. Sam, i can
provide a demo account for testing.

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   Chris