When I test My website optin form I get an error message: "We have detected you are using an unrecognised IP address. I add to Brevo, still a problem.
Hi ptxyz123,
This is related to Brevo’s IP security feature. After 30 days of using an API key, the system switches to blocking mode, meaning any request from an unrecognised IP will be rejected.
To fix it, simply add your IP to the authorised list:
- Go to Account → Security → Authorized IPs (or directly via this link)
- Add the IP address you’re using to test your form
That’s it! Note that authorising an IP also covers its full /24 subnet range.
If you’re unsure which IP to add, you can find it at whatismyip.com. You can also turn this feature on or off entirely in your security settings if you don’t need it.
More details here: Block unknown IP addresses for API security
Hope that helps!