Subscriptions and Newsletters
This article explains how readers can subscribe to your blog to receive email notifications of all of your posts.
On WordPress.com, any reader can follow (subscribe to) your blog to receive an email every time you write a new post. Logged in users of WordPress.com can do this by clicking the Follow button in their admin bar. Logged out readers can click the Follow button in the lower right-hand corner of your blog’s home page. For more information about this, see this article.
Once readers have followed your blog, they can elect to receive an email each time you post, or to receive daily or weekly digests of all of your new posts. They can also elect to receive no emails, but to read your blog only in the WordPress.com Reader.
To make it more obvious how to follow your blog, you can put the Follow Blog Widget in your sidebar or footer area. You can also use the Blog Subscription Shortcode to add a follow blog form to any post or page of your blog.
Note: If you have your Site Visibility options set to private, your subscribers will not receive any email notifications of your posts.
Follow by RSS
WordPress.com does not offer a tool for creating your own custom newsletters; however, if you would like to offer a newsletter subscription, you can use a contact form that interested readers can fill out to be added to your newsletter list. Then, you can send your newsletter out from your own email client or newsletter service.