public function setMaxLineLength(int $maxLineLength): Message
    {
        // Each line of characters MUST be no more than 998 characters,
        // and SHOULD be no more than 78 characters, excluding the CRLF.
        // https://tools.ietf.org/html/rfc5322#section-2.1.1
        $maxLineLength = (int) abs($maxLineLength);

        if ($maxLineLength > 998) {
            $maxLineLength = 998;
        }

        $this->maxLineLength = $maxLineLength;

        return $this;
    }