Zend_Mail::getCharset PHP Method

    public function getCharset()
    {
        return $this->_charset;
    }

    /**
     * Return all mail headers as an array
     *
     * If a boundary is given, a multipart header is generated with a
     * Content-Type of either multipart/alternative or multipart/mixed depending
     * on the mail parts present in the {@link $_mail Zend_Mail object} present.
     *
     * @param string $boundary
     * @return array
     */
    protected function _getHeaders($boundary)
    {
        if (null !== $boundary) {
            // Build multipart mail
            $type = $this->_mail->getType();
            if (!$type) {
                if ($this->_mail->hasAttachments) {
                    $type = Zend_Mime::MULTIPART_MIXED;
                } elseif ($this->_mail->getBodyText() && $this->_mail->getBodyHtml()) {
                    $type = Zend_Mime::MULTIPART_ALTERNATIVE;
                } else {
                    $type = Zend_Mime::MULTIPART_MIXED;
                }
            }

            $this->_headers['Content-Type'] = array(
                $type . '; charset="' . $this->_mail->getCharset() . '";'
                . $this->EOL
                . " " . 'boundary="' . $boundary . '"'
            );
            $this->_headers['MIME-Version'] = array('1.0');

            $this->boundary = $boundary;
        }

        return $this->_headers;
    }