After your blog or site has been up for awhile, you probably will receive an email alert, informing you of “new user registration”. The email will provide you with the new user’s username and email. It can be a bit confusing to get the first email like this–especially since most likely, your blog is available for the public to view.
But there is an explanation–it’s not a problem with your site’s security. In fact, it’s a good thing. It means that you have a reader who wants to subscribe to show that they enjoy your blog!
Any reader of your blog can actually sign up as a subscriber–just as you are an editor or site administrator, they can be a subscriber. But they won’t have access to edit your blog’s content or look–they won’t be able to log into your blog and change things. If you check your General Settings within your Dashboard, you will be able to see that the “anyone can register” box is checked (which is the default setting), as well as the new user default role (make sure that this is at the “subscriber” level so that they cannot change anything on your site).
If you really don’t want people to be able to register on your blog, then uncheck the membership box. However, you should allow people to register–since it’s anything but bad. You will get many, many spam subscribers–but they still can’t do anything to your site by subscribing. To thwart those spam bots, you can add a CAPTCHA (one plugin that also gives you a comment form is the FS Contact Form), or try another plugin that I’ve heard about: Bad Behavior.
Some blogs and sites save their subscribers’ email addresses so that they can send them subscriber-only specials–but don’t feel obligated to do so. As mentioned before, for the most part, people sign up to indicate that they like your site and will continue to read it. More subscriber sign-ups are just an excuse to be proud of your site!
As a blogger, website maintainer and more, with a B.A. in Journalism, I'd love to have the opportunity to set up a blog (like this one) for you! Click "hire me" for details!