code: public void setUtf8Content(final Object content) throws MessagingException
  	{
  		final String type = EmailConstants.MIMETYPE_TEXT_PLAIN + EmailConstants.CHARSET_PREFIX
  			+ EmailConstants.CHARSET_UTF8;
  		setContent(content, type);
  	}
docs: Sets the utf8 content.
  
  @param content
  the new utf8 content
  @throws MessagingException
  is thrown if the underlying implementation does not support modification of
  existing values
  
  @see javax.mail.Part#setContent(java.lang.Object, java.lang.String)