If this is a fresh installation, the license key step occurs early in the setup process.
| Error Message | Cause | Solution |
|---------------|-------|----------|
| License key is invalid | Typo or wrong key | Re-copy from purchase source (no extra spaces). |
| License domain mismatch | Key is registered to a different domain | Go to MailWizz website → License Manager → Update domain to your current one. |
| License key expired | Subscription lapsed (if yearly plan) | Renew your license at MailWizz official site. |
| Connection timeout | Server cannot reach MailWizz API | Check outgoing HTTPS (port 443) and firewall. |
| Key already in use | Same key used on multiple live domains | Purchase additional license or deactivate old domain. | mailwizz license key install
If you skipped license entry during setup, or need to update your key (e.g., renewal, domain change), follow these steps. If this is a fresh installation, the license