How to stop spam subscribers on WordPress email subscribe form?

Email subscription forms are very essential for any website to let visitors subscribe to new contents. Email subscription forms will also let website owners collect emails which can be used for online marketing. However, mail subscribe forms may also attract a lot of spam subscribers. In this post, we shall see how to stop spam subscribers on WordPress email subscribe form using free plugins.

Before we discuss how to stop spam subscribers, let's discuss briefly how to include a Subscribe Form in WordPress.