Anti-spam filtering
Honeypot, rate limiting, DNS checks and heuristic analysis.
WEB FORM PROTECTION
Less spam. More trust.
An independent gateway that verifies unknown senders before delivering their message.
No Google CAPTCHA or paid third-party SaaS
No Google CAPTCHA or paid third-party SaaS/PHP 8.4/MariaDB 11.4
01 / PROTECTION
How does SYGNEX Guard work?
Human verification
A self-hosted challenge before first delivery.
Multi-site and multi-tenant
Separate keys, quotas and rules per site.
6 native languages
French, English, German, Italian, Chinese and Vietnamese.
02 / HOW IT WORKS
How does SYGNEX Guard work?
The form sends the message to Guard through a server-to-server connection.
Rules, lists and limits are checked before contacting the sender.
An unknown sender solves a math challenge, then the message is delivered.
03 / PLANS
Flexible protection
Internal sites
Unlimited internal plan managed by the administrator.
Free plan
For small external sites: initial quota of 100 protected messages per month, adjustable by the administrator.
Premium
For higher usage: initial quota of 1,000 protected messages per month, adjustable by the administrator.
Enterprise
Custom quota after reviewing requirements and available sending capacity.
04 / FREQUENT QUESTIONS
Frequently asked questions about SYGNEX Guard
Who can use SYGNEX Guard?
The website and documentation are public. API access is limited to sites registered and approved by an administrator. People submitting a form protected by Guard do not need a Guard account.
What is the message quota?
Initial limits are 100 protected messages per month for Free and 1,000 for Premium. Enterprise plans use a custom quota. Administrators can change these values.
Does SYGNEX Guard rely on Google CAPTCHA?
No. This version generates its human challenge locally. Email delivery still depends on hosting capacity and policy.
SYGNEX PRODUCTION
API documentation βLess spam. More trust.
The PHP connector makes a server-to-server request. Never put keys in JavaScript or the browser.