this._unchunkedBody = new Buffer(this._unchunkedBody, 'utf-8'); } else if (iconvLite.encodingExists(charset) && !/^utf-?8$/i.test(charset)) { this._unchunkedBody = iconvLite.encode(this._unchunkedBody, charset); this._unchunkedBody = this._unchunkedBody.toString('binary'); this._unchunkedBody = quotedPrintable.encode(this._unchunkedBody);