CleanTalk's blog

Category: Anti-Spam

WordPress CAPTCHA: Should You Use It or Not? Pros and Cons Explained
In today’s digital landscape, protecting your WordPress website from spam and malicious activities is paramount. One of the most common tools used to achieve this is CAPTCHA. However, whether to use CAPTCHA or not can be a topic of debate among website owners. This article will explore the pros and cons of using CAPTCHA on your WordPress site, helping you make an informed decision.

What is CAPTCHA?

CAPTCHA, which stands for “Completely Automated Public Turing test to tell Computers and Humans Apart,” is a security measure used to determine whether the user is a human or a bot. It typically requires users to solve puzzles, enter text from distorted images, or check a box to verify their humanity.

Types of CAPTCHA

Before diving into the pros and cons, it’s useful to understand the different types of CAPTCHA you might encounter:
1. Text-based CAPTCHA
  Users are asked to enter characters from a distorted image.
2. Image-based CAPTCHA
  Users select images that match a given description (e.g., select all images with traffic lights).
3. Checkbox CAPTCHA (CAPTCHA)
  Users simply check a box to confirm they are not a robot.
4. Invisible CAPTCHA
  This version works in the background and only challenges the user if it detects suspicious behavior.
Pros of Using CAPTCHA on WordPress
1. Spam Protection
  Benefit: CAPTCHA effectively prevents automated bots from submitting forms, which is crucial for reducing spam in comments, registration forms, and contact forms.
  Explanation: Bots often target forms to post spammy content or create fake accounts. CAPTCHA acts as a gatekeeper, allowing only genuine human interactions.
2. Enhanced Security
  Benefit: By blocking automated scripts and bots, CAPTCHA adds an extra layer of security to your WordPress site.
  Explanation: This can be particularly important for sites that process sensitive information or have user registration features, as it helps prevent brute-force attacks and data scraping.
3. Reduced Server Load
  Benefit: Limiting spam and bot traffic can reduce the load on your server, improving overall site performance.
  Explanation: Bots generating excessive requests can slow down your site or even crash it. CAPTCHA helps mitigate this risk by filtering out non-human interactions.
4. User Verification
  Benefit: CAPTCHA ensures that submissions (like comments or sign-ups) are made by real users, maintaining the quality and integrity of your site’s content.
  Explanation: This is especially useful for sites with user-generated content, where maintaining a community of genuine users is crucial.
5. Flexible Integration
  Benefit: Many WordPress plugins offer easy CAPTCHA integration for various forms and functionalities.
  Explanation: Popular plugins like Contact Form 7, WPForms, and others allow you to add CAPTCHA to protect your forms with minimal effort.
Cons of Using CAPTCHA on WordPress
1. User Experience Impact
  CAPTCHA can create friction in the user experience, potentially deterring visitors from completing forms or engaging with your site. Users may find solving CAPTCHA puzzles frustrating or time-consuming, leading to higher abandonment rates, especially on mobile devices.
2. Accessibility Issues
  CAPTCHA can pose significant challenges for users with disabilities, making it difficult or impossible for them to interact with your site. Visually impaired users, for example, may struggle with image-based CAPTCHAs, while others with cognitive disabilities may find the puzzles confusing. Even audio CAPTCHAs can be problematic for those with hearing impairments.
3. False Positives
  Sometimes, legitimate users can be incorrectly flagged as bots, preventing them from completing their intended actions. This can happen due to various reasons, such as users failing to solve the CAPTCHA correctly or using certain browser extensions that interfere with CAPTCHA detection.
4. Maintenance and Compatibility
  CAPTCHA implementations may require ongoing maintenance and updates to remain effective and compatible with your WordPress site. As bots evolve, CAPTCHAs must also be updated to stay ahead. Additionally, plugin conflicts or updates can sometimes cause compatibility issues, requiring troubleshooting and technical know-how.
5. Increased Load Time
  Adding CAPTCHA can slightly increase page load times, which might impact your site’s performance. Each CAPTCHA requires additional resources to render and validate, which can contribute to longer loading times, particularly if not optimized.
Alternatives to CAPTCHA

Given the potential drawbacks, you might wonder if there are alternatives to CAPTCHA that can provide security without compromising user experience. Here are a few options:

1. Anti-Spam Plugins

How it works: Plugins like CleanTalk analyze form submissions and user behavior to filter out spam without the need for CAPTCHA.
Benefit: They offer seamless protection with minimal impact on user experience.

After the Anti-Spam is installed and activated, it protects your website and all forms from spam bots, keeping them from overloading your site. That’s how the website “looks” for spam bots:

Protection of your forms will also triggered even before a form is submitted, thus protecting your forms from getting spammed. That’s how it “looks”:

“Also, take a look at what we think about the pros and cons of reCAPTCHA in our dedicated post, reCAPTCHA Alternative.”

2. Honeypot Fields

How it works: Hidden form fields are added that human users can’t see but bots will fill out. If these fields are completed, the submission is flagged as spam.
Benefit: This method is invisible to users and doesn’t affect their experience.

3. Time-Based Methods

How it works: Measures the time taken to complete a form. Bots typically submit forms almost instantly, whereas humans take longer.
Benefit: This is a passive method that doesn’t require any action from the user.

4. JavaScript-Based Solutions

How it works: Uses JavaScript to detect bots based on behavior and patterns that are unusual for human users.
Benefit: These solutions operate behind the scenes, making them less intrusive for users.

Conclusion

CAPTCHA is a simple and free tool that will help you eliminate most spam bots. It is very useful for users in the first stage of launching their WordPress website.

However, in the next step, you may need a more advanced solution. For example, one that will give much more protection against spam bots to increase the speed of your site, and also, will be completely invisible to save precious time of your site visitors. As such a solution, we recommend CleanTalk Anti-Spam, a service we have been improving for more than 10 years. The full list of features can be found here.

Consider your audience and the nature of your site when deciding. If your site handles sensitive information or has high spam vulnerability, CAPTCHA could be beneficial. However, for sites focused on user engagement and accessibility, exploring alternatives might be more appropriate.

Try Anti-Spam by CleanTalk for Free
February 24, 2026
Security Update: Please Update CleanTalk Anti-Spam to the Latest Version

We’re reaching out to let you know about a security vulnerability that was recently disclosed in the CleanTalk Anti-Spam plugin for WordPress. We’ve already released a fix, and we want to make sure you’re protected.

What happened?

On February 14, 2026, a vulnerability (CVE-2026-1490) was publicly disclosed affecting CleanTalk Anti-Spam plugin versions 6.71 and earlier. The issue was found in the checkWithoutToken function, which relied on reverse DNS (PTR record) resolution to verify incoming requests. An attacker could spoof a PTR record to impersonate CleanTalk servers, potentially allowing them to install unauthorized plugins on a vulnerable site. In a worst-case scenario, this could lead to remote code execution through a chain of exploits.

Here’s the important part: this vulnerability only affects sites running with an invalid or expired or missing API key. If your CleanTalk subscription is active and your API key is valid, the exploitable code path is never triggered. That said, we strongly recommend updating regardless – it’s simply good practice.

What you need to do:

Update the plugin to version 6.72 or later – the fix is already available in the WordPress plugin repository
Verify your API key is active and valid in your CleanTalk dashboard at https://cleantalk.org/my or in your WP Dashboard->Settings->Anti-Spam by CleanTalk.
If you have auto-updates enabled, you may already be on the latest version — but please double-check

Keeping plugins up to date is the most effective way to maintain website security.

What we’ve done on our end:
We patched the checkWithoutToken function to no longer rely solely on PTR records for authorization. The updated verification process uses stronger validation methods that cannot be spoofed. The fix was released in version 6.72, which is available now.

References:
CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1490
Wordfence advisory: https://www.wordfence.com/threat-intel/vulnerabilities/id/cb603be6-4a12-49e1-b8cc-b2062eb97f16
Plugin changelog: https://wordpress.org/plugins/cleantalk-spam-protect/#developers

A note from our team:
We take security seriously – both yours and our own. No software is immune to vulnerabilities, but what matters is how quickly they’re addressed and how transparently they’re communicated. We identified the issue, developed a fix, and released the update promptly.

We’re also conducting an internal review of similar patterns across our codebase to prevent this class of vulnerability from recurring.
If you have any questions or need assistance updating, our support team is here to help at support@cleantalk.org.

Best regards,
The CleanTalk Team

February 20, 2026
wpForo Forum – Spam Protection
CleanTalk added spam protection for wpForo Forum multi-layout bulletin board using direct form integration. So in case, you prefer using wpForo be sure to use the most effective Anti-Spam plugin. Read the guide below and learn 4 steps to protect your wpForo Forms from spam.

Once the CleanTalk Anti-Spam plugin is installed it starts to protect all of the existing forms on your WordPress website. It may not only be wpForo forms but also many others.

Download CleanTalk Anti-Spam plugin | Download wpForo Forum

How to install CleanTalk Anti-Spam plugin

To install the Anti-Spam plugin, go to your WordPress admin panel → Plugins → Add New.

Then enter «СleanTalk» in the search box and click the Install button for «Spam protection, Anti-Spam, FireWall by CleanTalk».

After installing the plugin, click the «Activate»‎ button.

After it is done go to the plugin settings and click the «Get Access Key Automatically» button. Then just click the «Save Settings»‎ button.

That’s it! From now you know how to completely protect your wpForo Forum plugin from spam.

How to check spam protection for wpForo Forms

You can test the work of Anti-Spam protection for your СonvertKit Forms by using a test email s @ cleantalk.org (without spaces). First, open the form in an Incognito browser tab. Fill in all the required form fields and send a form. After submitting the form, you will see a block message about the block on the form submission.

If you have any questions, add a comment and we will be happy to help you.

Create your CleanTalk account – Register now and protect your СonvertKit Forms from spam in 5 minutes

Update

The protection works only for website visitors, not for website admins. Be sure to test the form protection using Incognito mode.

Additional features
- CleanTalk protects all forms at once: comments, registrations, feedbacks, contacts, reviews.
- Installation takes about 1-2 minutes.
- Smart 99% protection against spambots.
- Always online – 24/7 technical support.
- Logs, SpamFireWall, personal lists, country filters, stop-words, and many others.
Discover CleanTalk Anti-Spam plugin features.
February 19, 2026
User Registration & Membership – Spam Protection Guide in 2026
CleanTalk has added spam protection for the User Registration & Membership WordPress plugin by WPEverest through direct form integration. If you use this plugin, be sure to enable the highly effective CleanTalk Anti-Spam solution. In this post, we also review all anti-spam options available for User Registration & Membership.

User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder

First of all let’s see what this plugin is,

User Registration & Membership by WPEverest is a powerful WordPress plugin for creating custom user registration forms, login pages, and membership websites without coding. It features a drag-and-drop form builder, user profile management, content restriction, and payment integrations for subscription-based sites. Ideal for communities, online courses, and client portals, the plugin helps website owners manage users and memberships efficiently while improving user experience.

According wordpress.org, this plugin is installed on 60,000+ sites. All features of Anti-Spam plugin by CleanTalk for WordPress.

Installing User Registration & Membership

There are few steps to be this plugin installed,
1. Go to WordPress console -> Plugins -> Add plugin, type ‘user’.
2. Install ‘User Registration & Membership’ by WPEverest and activate the plugin.
3. Next you see a setup screen, that can be skipped on this moment.
4. That’s all the plugin is installed!
On the next steps we work with page YOUR-SITE.COM/registration/.

By the if you want place the registration form on another page,
1. Follow to WordPress console -> User Registration & Membership -> Registration form.
2. Copy shortcode like this [user_registration_form id=”8″] from the right/top corner of screen and place on any other page you want to.
Anti-Spam plugin by CleanTalk for WordPress

In beginning a few words about the plugin that we are going to use against spam,

CleanTalk Anti-Spam plugin for WordPress automatically protects your website from spam comments, registrations, contact forms, and fake orders without using CAPTCHA. It uses cloud-based spam detection and real-time databases to block bots in the background while keeping the experience smooth for legitimate visitors.

According wordpress.org, this plugin is installed on 200,000+ web sites. To install the plugin please follow this guide.

The next step is testing the anti-spam protection.

How to check spam protection for User Registration & Membership

We are going to test protection and the most important step in this process to do it as a regular visitor, not as as authorized user/administrator in WordPress console!

Follow this,
1. Jump to YOUR-SITE.COM/registration/ in incognito mode in your browser.
2. Fill up the form using test email address s@cleantalk.org. This is a service email, using which do not cause block listing your IP in CleanTalk’s cloud.
3. You see response from the cloud like this,
*** Forbidden. Sender blacklisted. Anti-Spam by CleanTalk. ***

That’s all! The protection is active and ready to go. If you have any questions, add a comment and we will be happy to help you. In addition, in the Cloud Dashboard you can find extra details regarding all submissions for registration form.

What additional anti-spam tools are available for User Registration & Membership?

On this day on the market there are a few more tools to protect User Registration & Membership against spam bots. As well as this plugin has some built-in tools. Let’s see what we have,
1. This plugin has built-in integration with Google reCaptcha version 2 and 3. reCAPTCHA by Google helps protect WordPress registration forms from spam by verifying that users are real people using behavioral analysis or interactive challenges. It blocks automated bot sign-ups and reduces fake registrations while allowing legitimate users to register securely.
  The settings located are here WordPress console -> User Registration & Membership -> Registration & Login -> Captcha. The Site and Secret keys are available on website.
2. The next tool is hCaptcha. hCaptcha is a privacy-focused CAPTCHA solution that protects WordPress registration forms from spam by requiring users to complete human verification challenges, helping block automated bot sign-ups. Unlike reCAPTCHA by Google, hCaptcha places stronger emphasis on user privacy and data control, making it a popular alternative for websites that want effective spam protection with less tracking.
  The settings located are here WordPress console -> User Registration & Membership -> Registration & Login -> Captcha. The Site Key and Secret key are available on website.
3. Next is Turnstile by Cloudflare. It protects WordPress registration forms from spam by automatically verifying visitors using browser and behavioral signals without showing CAPTCHA challenges. Unlike reCAPTCHA, Turnstile is designed to be privacy-friendly and frictionless, reducing spam registrations while keeping the signup process seamless for real users.
  The settings located are unde same path as tools before WordPress console -> User Registration & Membership -> Registration & Login -> Captcha. The Site Key and Secret key are available on website.
4. There are also bunch of universal anti-spam plugins like Simple CAPTCHA Alternative by Elliot Sowersby, WP Armour and etc. All of them can be found on wordpress.org.
As my research shows there is no plugins or direct integration with Akismet.

I have questions…

What if I don’t use User Registration & Membership plugin, but still have spam registrations (users)?

In this case, Anti-Spam by CleanTalk is the best way to get rid of standard wordpress registration forms spam.

Does this guide work for WPforo plugin?

No, it does not. Read this guide instead to protect WPforo Forum against spam registrations.

How about spam protection for s2Member plugin?

Please use another guide in order of s2member spam protection.

Final thoughts

I hope this guide helped resolve all spam issues on your registration form. If not, Sign Up for an account and our CleanTalk team will be happy to help.
February 15, 2026
Spam Protection – S2Member Memberships
If you prefer to use s2Member Memberships & Subscriptions registration form be sure to use the most effective Anti-Spam plugin. Read the guide below and learn 4 steps to protect your s2Member Registration Forms from spam.

Once the CleanTalk Anti-Spam plugin is installed it starts to protect all of the existing forms on your WordPress website. It may not only be registration forms but also contact forms and many others.

CleanTalk Anti-Spam plugin for WordPress | Download s2Member Registration Form plugin

How to install CleanTalk Anti-Spam plugin

To install the Anti-Spam plugin, go to your WordPress admin panel → Plugins → Add New.

Then enter «СleanTalk» in the search box and click the Install button for «Spam protection, Anti-Spam, FireWall by CleanTalk».

After installing the plugin, click the «Activate»‎ button.

After it is done go to the plugin settings and click the «Get Access Key Automatically» button. Then just click the «Save Settings»‎ button.

That’s it! From now you How to completely protect your s2Member Registration Form from spam.

Check the result to save your s2Member Registration Form from spam

You can test the work of Anti-Spam protection for your s2Member Registration Form by using a test email s @ cleantalk.org (without spaces). First, open the form in an Incognito browser tab. Fill in all the required form fields and send a form. After submitting the form, you will see a block message about the block on the form submission.

If you have any questions, add a comment and we will be happy to help you.

Create your CleanTalk account – Register now and protect your s2Member Registration Form from spam in 5 minutes

Update

The protection works only for website visitors, not for website admins. Be sure to test the form protection using Incognito mode.

Additional features
- CleanTalk protects all forms at once: comments, registrations, feedbacks, contacts, reviews.
- Installation takes about 1-2 minutes.
- Smart 99% protection against spambots.
- Always online – 24/7 technical support.
- Logs, SpamFireWall, personal lists, country filters, stop-words, and many others.
Discover the complete list of CleanTalk Anti-Spam plugin features here.
February 15, 2026
About the email “[CleanTalk] Access key used on multiple websites”

Recently, some of our users received an email with the subject:

“[CleanTalk] Access key used on multiple websites”

The message informed you that your CleanTalk Access key was detected on more than one website within a 24-hour period and recommended changing the key if the activity looked suspicious.

The notification looked like this:

Subject: [CleanTalk] Access key used on multiple websites

We noticed that your CleanTalk Access key has been used on more than one website within the last 24 hours.

Product: Anti-spam for sites
Access key: your_access_key

List of IPs:
https://cleantalk.org/ipinfo/IP_addr

If you do not recognize these websites, your Access key may have been compromised.
Please change your Access key as soon as possible.

This email was part of a new security feature designed to help prevent possible Access key leaks and unauthorized usage. We recently launched a new security feature that monitors whether a CleanTalk Access key is being used on multiple websites within a short period of time.

The idea behind this was simple — help prevent possible key leaks or unauthorized usage and notify users if something looks suspicious.

However, after launch we discovered an issue in the detection logic. Because of this, many users received this notification by mistake.

That was our error — and we sincerely apologize for the confusion and concern it may have caused.

We have already corrected the algorithm and added additional checks to prevent false alerts in the future.

Thank you for your understanding and for trusting CleanTalk to protect your websites.

If you have any questions, our support team is always here to help.

— The CleanTalk Team

February 11, 2026
Our Client’s Review: BRNDTIME

We’re happy to share feedback from one of our valued clients — Christophe Thielens, founder of BRNDTIME.

At CleanTalk, we truly appreciate hearing how our anti-spam solution helps agencies and businesses keep their websites clean, fast, and user-friendly. Reviews like this motivate our team to continue improving our technology and delivering invisible, reliable protection against spam.

About BRNDTIME

BRNDTIME is a digital marketing agency based in Belgium, focused on helping SMEs and independent professionals grow their online presence.
The agency specializes in building high-performance WordPress websites, SEO, online advertising, branding, content creation, and email marketing — always with a strong emphasis on usability, performance, and measurable results.

Client feedback

Christophe shared his experience with CleanTalk both on WordPress.org and on the BRNDTIME website:

“Very good plugin — works very well for my agency.
No captchas, no false positives, no slowdowns.
A solid and trustworthy plugin.”

BRNDTIME – Digital marketing bureau 01 29 2026 03 19 PM

Using CleanTalk Anti-Spam, BRNDTIME protects WordPress websites from spam submissions without affecting visitor experience. The absence of CAPTCHAs, combined with accurate filtering and no performance impact, allows the agency to focus on building and marketing websites — not cleaning up spam.

We’d like to thank Christophe Thielens and the BRNDTIME team for trusting CleanTalk to protect their projects and for sharing their honest feedback with the WordPress community.

🔗 Client website: https://brndtime.be/

🔗 WordPress.org review: https://wordpress.org/support/topic/very-good-plugin-works-very-wel-for-my-agencie/

🔗 BRNDTIME article about CleanTalk:
https://brndtime.be/2026/01/27/cleantalk-anti-spam-plugins-spamvrije-wordpress-website/

January 29, 2026
How Spam Activity Changes Over Time — and Why It’s Not Related to License Expiration

From time to time, website owners report a sudden increase in spam activity and try to link it to plugin settings, hosting, or license status.
However, these assumptions often overlook how dynamic spam behavior truly is.
To illustrate this, I conducted a small study analyzing spam distribution over time using data from several of our WordPress sites.

First, I’ll look at data for three of our WordPress sites, which host our themed blogs. The statistics are for the year.

1. Our blog, ClanTalk Anti-Spam and Security https://blog.cleantalk.org/

The screenshot shows the statistics for the year.
As you can see from the graph, the number of spam attacks isn’t linear, but fluctuates from month to month. Only since August has there been any stability, and the number of spam attacks has been more or less consistent.

All time 10 979 spam blocked 10 21 2025 11 17 AM

2. Our blog, research.cleantalk.org

The graph shows an increase in spam attacks at the beginning of the year, followed by a decline to almost zero. However, in May, there is a peak in spam attacks, followed by a sharp decline. Subsequently, there is a slight increase in spam attacks.

All time 6 567 spam blocked 10 21 2025 11 30 AM

3. Our blog, blog.doboard.com

The blog was launched recently, and from the very beginning, it was clear that the number of spam attacks was high, but after some time, there was a decrease.

All time 195 spam blocked 10 21 2025 11 29 AM

4. Personal WordPress Test Site

The following graph shows statistics for my personal WordPress site, which I use for testing.
The graph shows a steady increase, peaking in May and then declining.

All time 19 510 spam blocked 10 21 2025 11 19 AM

What Does This Tell Us?

Based on this data, I can draw the following conclusions:
the number of spam attacks does not show any trend, other than a possible seasonal factor.

The number of spam attacks may not be linear from month to month or even from day to day. At some points, there may be more, at others, fewer. A low-traffic site like my test site can receive a much higher number of spam attacks than a site with more traffic, a larger number of articles, and a higher search engine ranking.

What I did next?

Now let’s talk about how a user can evaluate the difference between the amount of spam a client sees while using an anti-spam service and when the license expires.

First, as you can see on our new site, the number of spam attacks increases as it gets added to spam lists.

Second, when a client installs the CleanTalk Anti-Spam plugin, we have the SpamFireWall option. This option blocks spammers before they reach the site.

CleanTalk Anti Spam Dashboard 10 21 2025 11 20 AM

As you can see from this table, we currently receive 12-14 spam attacks per day. These requests can be found, for example, in the spam folder on their site. On average, there were 57 spam attacks per week, and SpamFireWall (SFW) blocked another 350.

Then, I disabled SFW, and the number of spam attacks reaching the website form immediately increased to 120 on average. So, we see that when using SFW, 50% of spam attacks reach the website and forms, and the remaining spam attacks were stopped by SFW and simply didn’t reach the website.

Therefore, when assessing the amount of spam, we must also take into account the portion of SFW traffic that simply didn’t reach the website forms. You can track statistics for your sites in the Trends section of the ClanTalk Dashboard.

To summarize

The number of spam attacks is not constant and can be higher or lower. Also, when using SFW, you only see a portion of the spam reaching the forms on your website. Having or not having a CleanTalk license doesn’t affect the number of spam attacks.

October 22, 2025
Client Review: Climate Change Dispatch

We are happy to share feedback from one of our clients — Thomas, the owner of climatechangedispatch.com

Great support, even better spam killer

I was using Akismet for WordPress for years until I found Cleantalk. I got an email from Automaticc, which owns Akismet and Jetpack, stating that because I had some ads on my site, I had to pay a ridiculous amount of money. They gave me 30 days. I switched to Cleantalk as it was cheaper, and the difference was amazing.
Not only did it catch spam, but the personal blacklists are a timesaver. No more hits or misses from imprecise wording in the Discussion settings. And the support is absolutely superb. The few times I’ve needed them, they were prompt and fantastic. The firewall and bot-crawler features are also a timesaver. Did you know that auto-bots crawl your site and slow it down? I’m talking spammy bots looking for email addies. This plugin stops them. And also prevents spam after spam from getting through via rate limiting. Try it out, and I swear you will rarely, if ever, have to get rid of spam manually. It’s that good!

We thank Thomas for his detailed feedback and trust in CleanTalk.
It’s always a pleasure to hear that our service helps clients protect their websites and save time.

September 11, 2025
QuickCal Spam Protection for WordPress

quickcal screenshot 03

QuickCal forms is a good choice when you need to use a powerful booking calendar. Always be sure to use the most effective Anti-Spam plugin. For example CleanTalk Anti-Spam will guarantee your QuickCal booking form spam protection in about 5 minutes.

Once CleanTalk Anti-Spam plugin is installed it starts to protect all of the existing forms on your WordPress website. It may not only be QuickCal forms but many others.

Download CleanTalk Anti-Spam plugin | Download QuickCal plugin

How to install CleanTalk Anti-Spam plugin

To install the Anti-Spam plugin, go to your WordPress admin panel → Plugins → Add New.

Then enter «СleanTalk» in the search box and click the Install button for «Spam protection, Anti-Spam, FireWall by CleanTalk».

After installing the plugin, click the «Activate»‎ button.

After it is done go to the plugin settings and click the «Get Access Key Automatically» button. Then just click the «Save Settings»‎ button.

That’s it! From now your WordPress website and QuickCal forms are protected from spam.

You can always use our detailed installation instructions.

How to check your QuickCal forms spam protection in about 5 minutes

You can test the work of Anti-Spam protection for your QuickCal forms by using a test email s @ cleantalk.org (without spaces). First, open the form in an Incognito browser tab. Fill in all the required form fields and send a form. After submitting the form, you will see a block message about the block on the form submission.

If you have any questions, add a comment and we will be happy to help you.

Create your Cleantalk account – Register now and enjoy your spam-free QuickCal forms.

You may view a complete list of CleanTalk Anti-Spam plugin features here. https://cleantalk.org/help/introduction

WordPress spam protection

July 31, 2025

CleanTalk

Create a support ticket

Sign up / Sign in

Anti-Spam

Anti-Spam for Websites

Best Anti-Spam Plugins in 2026

Filter fake emails

Hide contact data

Security

Website Malware Scanner

WordPress Malware Removal

WordPress Security Plugin