"This license is already registered to another MailWizz instance," follow these steps: Reset Your License
| 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 | mailwizz license key work
: Once installed, you can check your current license status in the dashboard under Backend > Settings > License Info . 3. Common Issues and Resolutions "Already registered" License is tied to a previous IP or hosting environment. Use the MailWizz Reset License tool to unbind the key. App Goes Offline Outdated license info or using Regular license for SAAS. "This license is already registered to another MailWizz
MailWizz is a web-based email marketing application used to manage subscribers, campaigns, and delivery for email service providers, agencies, and businesses. A key part of its distribution and usage control is the license key mechanism. This essay explains what license keys are for MailWizz, how they work technically and operationally, their benefits and limitations, and best practices for administrators. Use the MailWizz Reset License tool to unbind the key
If you rebrand or switch domains, you cannot simply change the URL in settings. The license server will reject the new domain because it thinks it is a second installation.
MailWizz requires periodic online validation. If your server is completely air-gapped or firewalled from the internet:
After purchase, your license key is available in two places: