MailCamp Adds reCaptcha Enterprise for Signup Form Security
Dutch email platform MailCamp integrates Google reCaptcha Enterprise for stronger bot protection and better UX. Enterprise uses AI to block fake signups invisibly.
James Chen
April 10, 2026
Dutch email marketing platform MailCamp has added support for Google reCAPTCHA Enterprise on subscription forms, replacing the older reCAPTCHA V2 method with a more capable bot-detection layer. The update matters well beyond security: unprotected signup forms are a direct threat to sender reputation, list quality, and email deliverability, which are areas under tighter scrutiny from inbox providers right now.
Why Signup Form Security Is a Deliverability Issue
Spam bots targeting subscription forms are not a minor inconvenience. According to OOPSpam's 2024 Annual Spam Report, signup forms are the most frequently attacked form type, accounting for 45% of all spam form submissions. The downstream effect on email programs is real and measurable.
A spam bot is a malicious program that signs up for email lists using fake or real email addresses, and these attacks can harm your sender reputation, lower email deliverability rates, and lead to increased spam complaints and security breaches. When you send marketing emails to fake or invalid addresses, your bounce rates increase, signaling to email providers that your campaigns may be spam, which can lower your sender reputation and push your emails into the spam folder.
The timing of MailCamp's upgrade is relevant. A 2025 deliverability report found that 16.9% of emails never reach their destination, with more than 10% of emails in the US routed to spam in 2024. Gmail's bulk sender policy requires spam complaint rates below 0.10% and flags senders at 0.30% or higher, forcing marketers to tightly control list quality. Even a small number of bot-generated contacts polluting a list can push senders past those thresholds.
What reCAPTCHA Enterprise Actually Does Differently
According to MailCamp, reCAPTCHA Enterprise uses advanced risk assessment and machine learning to detect automated traffic far more effectively than the older V2 variant, resulting in less spam without subscribers noticing any difference.
The core distinction is how the two systems handle bot detection. Unlike reCAPTCHA V2, which often presents disruptive visual or audio puzzles, reCAPTCHA Enterprise works largely invisibly in the background, making it more user-friendly for people with visual impairments or cognitive challenges.
Under the hood, reCAPTCHA Enterprise draws on threat intelligence from trillions of transactions, billions of users and devices, and millions of websites, and uses those signals to power detection models that protect against fraudulent activity, spam, and abuse. The system assigns each user a risk score ranging from 0.0 to 1.0, and based on that score, the website operator determines whether to allow the form submission or block the user.
