AntiSpam for Contact Form 7
Plugin Review
AI-ResearchedWhat is AntiSpam for Contact Form 7?
AntiSpam for Contact Form 7 is a dedicated antispam plugin created by developer Erik. It has been available for 5 years and currently holds 10K+ active installs. The plugin earns a 4.2/5 rating from 12 reviews, with 75% of those being five-star ratings. It is designed to protect Contact Form 7 from bot flooding without relying on CAPTCHAs or tedious configurations. The developer states that the plugin uses a combination of on-page and off-page bot traps, plus a statistical Bayesian spam filter called B8.
This plugin directly addresses the common question of how to stop spam in contact form 7 wordpress. It does so by layering multiple detection methods rather than using a single barrier. The current version is 0.7.6, last updated on Apr 21, 2026. This tool is built for site owners who want a straightforward, no-key solution that still offers advanced controls for those who need them.
Key Features of AntiSpam for Contact Form 7
- Browser Fingerprinting — Detects bots by analyzing browser characteristics that automated scripts cannot replicate.
- Honeypot and Honeyform Traps — Hidden fields and forms that bots fill out automatically, but humans do not see.
- B8 Bayesian Statistical Filter — An auto-learning algorithm that identifies spam based on message content patterns, improving over time.
- GeoIP and Language Checks — Optionally restrict submissions by country or browser language using the GeoLite2 database.
- DNS Blackhole List (DNSBL) — Checks incoming requests against known spam-sending IP addresses in real time.
- Blocklists with Auto-Ban — Automatically blocks IPs after a set number of failed attempts, with an exclusion list for legitimate users.
- Time Elapsed Checks — Rejects submissions that are filled out too quickly (bots) or too slowly (suspected automation).
- Flamingo Integration — Turns Flamingo into a spam manager, allowing you to review caught messages and train the B8 filter.
Who Should Use AntiSpam for Contact Form 7?
This plugin is best for site owners who already use Contact Form 7 and want a free alternative to paid services. It suits beginners because the basic mode works immediately after installation. Advanced users can enable the full suite by adding a simple marker to each form. The plugin is ideal for small to medium sites that receive moderate bot traffic but do not want to lose conversions from CAPTCHAs.
Given its 10K+ install base and 75% five-star ratings, the plugin appeals to users who value control over automation. The 17% one-star ratings suggest that some users find the advanced setup steps frustrating, particularly the requirement to add a marker for B8 filtering. If you are willing to follow the Flamingo-style setup, you gain a highly customizable antispam plugin that can adapt to your specific bot threats.
Installation & Setup
Installation is standard: upload the plugin folder to /wp-content/plugins/ and activate it. Contact Form 7 must already be installed. For basic protection, no further configuration is needed. To enable the full antispam plugin functionality, including the B8 filter, you must add the marker flamingo_message: "[your-message]" in the additional settings panel of each form. This step mirrors the Flamingo setup process and is required for statistical analysis of email content.
Support & Community
Support data from the last 2 months shows 1 open thread with 0 resolved, resulting in a 0% resolution rate. This is a low support volume, but the complete lack of resolved threads is a concern. The plugin has 12 ratings total, with 75% 17% one-star ratings. The one-star feedback often points to the setup complexity for the B8 filter and the need for Flamingo to access the full spam manager. The developer is active but support appears limited, so users comfortable with self-diagnosis will fare best.
The plugin’s FAQ acknowledges that no tool can guarantee 100% protection. It explains that different bots fail different tests, which is why the plugin uses multiple methods like honeypot contact form 7 traps and fingerprinting. For those seeking the best antispam plugin wordpress has for CF7, this tool offers a unique blend of simplicity and depth, provided you are willing to invest a few minutes in the advanced setup.
Pros & Cons
- With 10K+ active installs and a 4.2 rating from 12 ratings, it is a moderately popular antispam solution for Contact Form 7.
- 75% of its 12 ratings are 5-star, indicating strong satisfaction among many users with its basic protection.
- It requires no configuration, keys, or registrations for basic antispam features like honeypots and language checks, lowering the setup barrier.
- The plugin integrates with Flamingo to add a dashboard widget and additional controls, extending its utility beyond spam filtering.
- Its optional GeoIP feature allows country- or language-based email restrictions, offering targeted control for specific use cases.
- Only 1 support thread exists with a 0% resolution rate, suggesting very limited or absent developer support for users.
- 17% of its 12 ratings are 1-star, a relatively high dissatisfaction rate for a plugin with few total reviews.
- Advanced Bayesian filtering requires manually adding a 'flamingo_message' marker to each form, which is tedious for sites with many contact forms.
- Enabling GeoIP requires signing up for a separate GeoLite2 license and downloading databases, adding extra steps beyond plugin installation.
Technical Details
- Requires WordPress
- 6.2+
- Requires PHP
- 7.4+
- Tested up to WP
- 6.9.4
- First Released
- 2021 (5+ years)
- Support (last 2 months)
- 1 threads — 0% resolved
Feature Tags
Frequently Asked Questions
Yes, AntiSpam for Contact Form 7 is completely free and available on WordPress.org. It requires no paid subscriptions, API keys, or registrations to activate its basic protection.
The plugin has 10K+ active installs according to WordPress.org data. It also holds a 4.2/5 rating from 12 user reviews.
AntiSpam for Contact Form 7 requires WordPress 6.2 or higher, and it has been tested up to WordPress 6.9.4. This ensures compatibility with modern WordPress sites.
Yes, the plugin was last updated on Apr 21, 2026 and is currently at version 0.7.6. It was first released in 2021, showing consistent maintenance over several years.
The plugin requires PHP 7.4 or higher to run properly. This ensures your server can handle its Bayesian spam filter and other advanced features.
Support is handled through WordPress.org forums, with 1 total support thread in the last 2 months. The plugin author, Erik, actively maintains the plugin and provides assistance.
Absolutely — the basic setup requires no configuration, keys, or registrations, making it ideal for beginners. For advanced use, you can add a simple marker in the additional settings panel of each contact form.
It uses a combination of on-page and off-page bot traps, plus a Bayesian spam filter (B8) that learns over time. Features include honeypots, fingerprinting, language checks, and seamless integration with Flamingo for enhanced spam management.