If one of your leads or clients tries to register through a form (e.g., opt-in, course registration, or webinar registration form) and their submission fails due to the email address being refused, this does not indicate a technical error. It indicates that Learnybox’s security system has automatically blocked the email address for security reasons.
Why this happens
To maintain optimal email deliverability and protect all platform users, Learnybox automatically verifies the validity and reputation of each email address entered into a form.
This verification helps us prevent:
Invalid or fake email addresses (for example, those created on temporary email services such as yopmail, mailinator, etc.)
Spam traps and spam-related addresses
Bot or automated registrations
Certain addresses or IPs associated with suspicious or abusive activity
In some cases, the use of a VPN or specific network configurations can also cause an email address to be flagged.
What to do
If one of your leads or clients experiences this situation:
Ask them to try again using a different email address, preferably a professional or personal address from a common provider such as Gmail, Outlook, Yahoo, or a company domain
If they were connected through a VPN, ask them to temporarily disable it and try again
If the issue persists, please contact our support team and provide the affected email address so that we can check it for you
Why this protection is important
This protection is essential to maintaining the quality of your contact lists and ensuring that your emails sent from Learnybox are successfully delivered. By preventing suspicious or invalid email addresses from being stored, we help protect your deliverability and strengthen your sender reputation. These measures ensure a healthy and reliable sending environment across the platform, so your communications remain effective, secure, and professional over time.