MessageBodyCharset indicates which character set should be used to display main body of the message. Default value of MessageBodyCharset property is an empty string. Most common values of MessageBodyCharset property are:
"us-ascii" - US ASCII
"iso-8859-1" - Western European (ISO)
"windows-1252" - Western European (Windows)
"unicode" - Unicode (internally converted to UTF-8)
"iso-8859-2" - Central European (ISO)
"windows-1250" - Central European (Windows)