If you are using a Wordpress theme which doesn’t support users subscribing to comments (crazy I know) you can add the plugin Subscribe to comments which is currently at version 2.1
A summary of the features this plugin provides:
- Rudimentary security
- Recognition of subscription status
- Themeable subscription manager
- Ability to let users change notification e-mail address
- Easy integration into comments form
- Subscription without leaving a comment
- Customization
- Internationalization
Installation is as easy as you’d expect from a Wordpress plugin. Simply upload 1 php file into the plugins directory, then “activate” the plugin in the admin area.
Then all you need to do is add a line of code to your theme comments.php where you want the checkbox to go and you’re ready!
<?php show_subscription_checkbox(); ?>
Read more and download the plugin here.