This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Astounding Spam Prevention


Using the most effective features of other spam programs. Astounding Spam Prevention effectively guards against comment spam and registration spam without the use of a Captcha.
This is a fork of the original Stop Spammers Spam Prevention and uses some of the code, but it is greatly simplified so it is not as aggressive and will not prevent a user from logging in. It does not interfere with jetpack and does not know about WooCommerce so there are no conflicts. Unlike Stop Spammers it does not check logins, but only checks registrations and comments.
It also repairs many bugs that I found in the Stop Spammers plugin and has many new methods for detecting spam.


Please buy one of my books and give it a good review. I worked hard on these books, and they are worth reading.
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  1. Install the plugin using «add new» from the plugin’s menu item on the WordPress control panel. Search for Stop Spammers and install.
  2. Download the plugin.
  3. Upload the plugin to your wp-content/plugins directory.
  4. Activate the plugin.
  5. Under the settings, review options that are enabled. The plugin will operate very well without changing any settings.


18 de octubre de 2023
I’ve used this for quite a few years now. Every now and again I get a msg from WP about it not working correctly, but then I don’t hear any more for ages. There seems to be one particular set of circumstances that trip it up, intermittently. I’ll contact the author, but despite that, it’s 5 stars. The reason is the simple interface, all options there and its small code footprint, plus, it catches all spam…. An almost perfect little plugin.I hope the author keeps it maintained as I see they do work on several other plugins.
16 de abril de 2023 4 replies
This plugin is really a spammer’s worse nightmare. Since installing it, my spam has been virtually eliminated. I use this along with another plugin called “User Verification” and both together help me accomplish my goal of ZERO spam on my blog. Thank you to the author for your great contribution. Please keep up the good work. Donating soon.
24 de junio de 2022
Браво! Стоило поставить его и все, все проблемы со спамом, регой ботов и хреновыми спам комментариями пропали. Пока что лучший на моей памяти плагин. Даже лучше платного Cleantalk, во всяком случае различает реального спамера от нормального пользователя. Благодарю, разрабам респект! Thank you!
7 de mayo de 2019
Actually works out of the box unlike other plugins. Stopped at least 90% of the spam registrations seen on 10 different sites without any adjustments to settings.
Read all 8 reviews

Contributors & Developers

“Astounding Spam Prevention” is open source software. The following people have contributed to this plugin.




  • Tested under WordPress 6.3
  • CheckSFS seems to be missing a valid index. If it keeps causing problems then uncheck it in the settings.


  • Tested under WordPress 6.2
  • Created warning for sites that cannot reach (Check your PHP error logs!)


  • Tested under WordPress 5.7.1


  • Tested under WordPress 5.4.1


  • Fixed bug in session speed check.


  • Added Phishing sites check.
  • added Blacklist IPs list check
  • moved Cache clear to the cache tab.


  • Fixed a bug in the SFS module.
  • Added the ability to clear the cache.
  • Fixed the Ajax calls in the settings. Brought it into this decade’s standards. jQUery definitely doesn’t work on many sites.


  • Beta WP broke jQuery so I added some code to make the admin options interface javascript load depending on jQuery. Turned out it is a beta issue that broke many things including JetPack.
  • Limited length of error message. Some spammers a filling in the author name or email with thousands of characters and it fills up the log quickly.
  • renamed the .javascript files back to .js. I am worried that the file type may be blocked.
  • replace jquery calls with custom code. Decided that the jQuery issues with WP are not worth it.


  • Added Red Herring form option.


  • Removed URI from logs. It took up too much room and was only interesting when debugging.
  • Added aditional check for action=register inside post in case registrations (bbpress) uses a different form.


  • Added back Stop Forum Spam check. This was failing for a while. Needs to be monitored.
  • Divided settings into recomended and optional.


  • Fixed some typos in descriptions.
  • Added a list to block VPN servers that are known spammers.


  • Fixed some typos in descriptions.
  • Added a list of common spam TLDs.
  • Added option to show all reasons for rejection, not just the first one.


  • Changed TLD checks to report the actual TLD even if not 3 characters.
  • Made the allowed tld list editable.
  • Change order of checks to put sessions checks near the end of the list.


  • Fixed typo checking for cached entries. It was letting them through.


  • Stopped showing cache hits in log. Most spammers try 4 times to do their thing and it was filling up the logs.
  • Added version number to settings page.
  • Added settings to plugin summary on plugins tab.
  • Added warning for larger log files.


  • Added a check for generated bad neighborhood list that the author maintains. List is newly discovered IP addresses only.


  • Changed the log file name to begin with a ‘.’ to prevent web servers from delivering log directly.
  • Changed display order of log file to most recent first.
  • Changed deny message to type 403 «forbidden».


  • Fix JavaScript error on options page.
  • Added new default spamwords.
  • FIxed DNSBL error.


  • Initial version. Forked many anti spam methods from original plugin «Stop Spammer Registrations Plugin».
  • added 9 new spam prevention methods and fixed bugs in 4 others.
  • Redesigned settings pages using easier updating and editing.
  • Uses expandable log file that can grow to fit.
  • Caching identifies the original source of the spam for easier troubleshooting.
  • Rewrote the load process to limit resource usage. Uses «lazy loading» to avoid memory usage when the plugin is not active.
  • Fixed bugs in plugin uninstall procedure..