You can easily encode mailto and plain email address links on your WordPress site and hide them from spambots. Email Encoder Bundle is a free WordPress plugin that plugin works directly when activated. Simply install and activate it, after activation visit your admin area Dashboard -> Settings -> Email Encoder Bundle plugin option page and check where you want options to take effect like you can enable it on all posts, comments and text widgets. You can set it to automatically encode both mailto and plain email addresses links, you can set class for mailto links and there are few more useful options.
With WP Mailto Links plugin you can easily protect all email addresses and mailto links from spambots and being used for spamming. The plugin is easy to use and configure.
With new WordPress plugin called Comment Auto Blacklist automatically adds IPs of spam comments to comment blacklist settings field in your WordPress site.
Akismet is best spam detector plugin but all comments made by spam bots end up in your WordPress Spams folder. This tutorial is about a light weight WordPress plugin that you can easily use with Akismet and increase a step for spambots when posting comments in your WordPress blog.
Here is an easy way for protecting your WordPress site’s email addresses from email-harvesting robots by encoding them into decimal and hexadecimal entities.