| Error Message | Cause | Solution |
|---------------|-------|----------|
| Invalid license key | Typo or wrong key | Re-enter from customer area |
| Domain mismatch | Key registered to different domain | Re-issue key from customer area for new domain |
| License expired | 12-month support period ended | Renew license (emails still work) |
| Connection to licensing server failed | Server firewall blocks outbound HTTPS | Allow port 443 to licensing.mailwizz.com |
Periodically (usually during login or update checks), the Mailwizz application installed on your server sends a request to the Mailwizz licensing server. This payload typically contains: mailwizz license key work
Not all MailWizz licenses work the same way. Depending on your purchase plan, the license key’s behavior changes. | Error Message | Cause | Solution |
| License Type | Key Behavior | Validation Frequency | Domain Restrictions | |--------------|---------------|----------------------|----------------------| | Regular (Yearly) | Works for 12 months. After expiry, key returns "invalid." | Daily | Single domain + unlimited subdomains (sub.xyz.com) | | Extended (Lifetime) | Never expires but still requires domain validation. | Daily | Single domain | | Developer | Allows installation on multiple domains (up to a limit). | Daily | Up to 5-10 domains per key | | Trial | Limited validity (e.g., 14 days). Stops working automatically. | Hourly | Single domain | | License Type | Key Behavior | Validation
When you install or run MailWizz, the system performs periodic validation calls to the MailWizz license server (https://www.mailwizz.com).