Custom Captcha Field for Fluent Forms vs MUTE – Contact Form Spam Blocker Without CAPTCHA

Adds a “Custom Captcha” field to the Fluent Forms editor with three challenge types: Image captcha — a 6-character code rendered as an image, with customizable text color and a transparent background by default so it blends with any form design Math captcha — a simple arithmetic question rendered as an image Question and answer — you define the question (field label) and the expected answer Challenges are single-use and expire after 15 minutes. Answers are stored server-side via WordPress transients — nothing is exposed to the browser except the image itself. Visitors get a refresh button to request a new challenge, and the captcha automatically renews after each AJAX submission, so it also works on cached pages. On top of the captcha you get two extra spam defenses: Time-trap (optional, off by default) — submissions completed faster than a human possibly could are rejected via an HMAC-signed timestamp; enable it and set the minimum submit time per field Disposable email blocking (optional, on by default) — rejects submissions where an email field uses a temporary/disposable email domain like mailinator.com or yopmail.com; extend the list with the ffc_captcha_blocked_email_domains filter Everything runs on your own server: no external captcha service, no API keys, no cookies, no visitor data sent anywhere. Requirements Fluent Forms is required. The PHP GD extension is recommended for image rendering (with a plain-text fallback when unavailable). How To Use Activate the plugin Edit a form in Fluent Forms — a new “Custom Captcha” field appears in the editor Drop it into your form and pick the captcha type in the field settings Optionally set the text color, background color (RGB values like “68, 68, 68”, or “transparent”) and error message

SPAM NEVER STOPS. Start with your site. ── MUTE : Good for the world. Still getting spam through your contact form? Tons of junk flooding your inbox every day? Every day, countless WordPress site owners open their inbox to find it buried under fake inquiries, promotional garbage, and suspicious links — all submitted through their own contact form. Real customer messages get lost. You waste time sorting through it all. And no matter how many times you delete them, the spam just keeps getting sent again. MUTE is a spam blocker that puts an end to that — silently, automatically, and without making your real visitors jump through any hoops. The Problem You’re Probably Dealing With You’re not alone. These are the situations we hear about every day: You run a restaurant. Your contact form was meant for customer inquiries — but every time you open it, it’s full of scam emails and unsolicited sales links. Exhausting before the day even starts. You manage an e-commerce site. Your inquiry form is buried under spam every night. Real customer questions keep getting pushed to the back, and response times are slipping. You run a salon. A message from a new client gets lost among spam emails. By the time you reply, they’ve already moved on. You’re in sales at a small business. Every morning you sift through virus-laden links and shady solicitations just to find the one real lead that came in overnight. Your team has started ignoring the contact form because it’s mostly junk — sales pitches, phishing emails, fraudulent messages. Real customer needs go unanswered. You added CAPTCHA to stop the spam. Customers complained it was frustrating to use, inquiries dropped — and it’s not really helping anyway. The spam kept coming. You’ve tried other anti-spam plugins. Bots still slip through. The junk never stops. People keep trying to sell you SEO services and marketing tools through your contact form. Every morning, your inbox is full of sales pitches instead of real customer messages. Bots (automated programs) are constantly crawling the web, hunting for unprotected contact forms to exploit. Once they find yours, the fake submissions keep getting sent again and again. Standard solutions like CAPTCHA ask your real visitors to prove they’re human — that friction costs you leads. There’s a better way. How MUTE Solves It MUTE works as a silent spam blocker running in the background of your site. It detects bot behavior before a form is ever submitted — no puzzles, no checkboxes, no interruption for real visitors. How it works: A lightweight script loads automatically on every page of your site It monitors form activity using multiple detection layers — honeypot traps, behavioral analysis, and browser checks Bots are identified and blocked before their fake submissions ever reach your inbox Real visitors experience absolutely nothing different — their messages go through normally The result: your inbox contains only real inquiries from real people. What Changes After You Install MUTE The restaurant owner who dreaded opening the contact form can now check it without stress — every message there is a real inquiry. The e-commerce team that was always behind on replies can now respond to real customer questions quickly. Better response times, better service. The salon staff who worried about missing a new client’s message can now reply with confidence — every message that arrives is real. The sales team member who wasted every morning sorting through junk can now get to real leads immediately. More time for actual work. Staff who had lost trust in the contact form now check it every day — because they know what’s there is genuine. Real visitors never encounter a CAPTCHA. Your form stays smooth and easy to use. Your contact form does what it was always meant to do: connect you directly with real customers. Checking it goes from a chore to a natural part of the day. Key Features Silent spam protection — blocks bots automatically, with zero impact on real visitors No CAPTCHA required — no friction, no puzzles, no drop-off in form completions Works with popular form plugins — Contact Form 7, WPForms, Gravity Forms, Elementor Forms, Ninja Forms, Jetpack Forms, and more One-line installation — activate the plugin and it works. No settings to configure Live stats in your WordPress dashboard — see how many spam submissions have been blocked 14-day free trial — no credit card required to get started Requirements A free MUTE account is required. Sign up at mute-it.com — no credit card required for the 14-day free trial. External Services This plugin connects to an external service operated by Ryu-Raku Inc. to provide spam detection and account management features. Your site communicates with this service to enable spam blocking and to display your account status in the WordPress admin panel. No personal visitor data is collected or transmitted. Service URL: https://mute-it.com/en/ Terms of Service: https://mute-it.com/en/legal/terms/ Privacy Policy: https://mute-it.com/en/legal/privacy/