diff --git a/README.md b/README.md
index 93cf62b8..efbc09b8 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ Then, follow these instructions to install CyTube:
 2. cd to the directory containing the source files
 3. Install your distribution's `libmysqlclient` package.
 3. Install dependencies: `npm install`
-4. Edit `config.js` and input your database details and connection port
+4. Edit `config.js` and input your database details and connection port.  Optionally, configure an SMTP transport to use for sending password reset emails (see https://github.com/andris9/Nodemailer).
 5. Edit `www/assets/js/iourl.js` and change the value of `IO_URL` to `yourhostname:port` where `port` is the port defined in `config.js`.  Also change `WEB_URL` to `yourhostname:web_port` where `web_port` is the websocket port you defined in `config.js`
 
 Running