By default, many mail systems that use 8-bit character encoding for text (like Asian language mail systems) convert from 8-bit MIME to 7-bit characters. This has the unfortunate effect of garbling the mail.
To receive 8-bit character-encoded mail messages, disable the default conversion that Postfix performs. Use the postconf command-line tool to disable the setting.
Log in to your server as the administrator.
In Terminal, enter the following command:
sudo postconf -e disable_mime_output_conversion=yesThis disables the special processing of Content-Type headers while delivering mail.