I’d like to set Thai to be my default language in Mail.app but I couldn’t find where to set it in Mail preference . So I did a little google and found the solution is very simple. In my case, Thai can use either Windows-874 and TIS-620. Here is the command that I run on Terminal and it works pretty well.
defaults write com.apple.mail NSPreferredMailCharset “TIS-620″
#1 by ศิษเฎศ ทองสิมา on May 10th, 2010
This set is for “outgoing” or “incoming” message krub?