Mailwizz License Key: Install
| 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. |
| Status | What it means |
|----------------------------|----------------------------------------|
| Valid license | Key is active → Unlicensed notice disappears, updates work. |
| Invalid license | Wrong key → Re-check and re-enter. |
| Blocked license | Key is revoked → Contact support. |
| Connection error | Server cannot reach MailWizz API → Check firewall/curl. |
The purpose of this report is to document the standard operating procedure (SOP) for installing, activating, and troubleshooting a MailWizz license key. Proper license installation is critical to unlock application features, receive updates, and validate the legality of the software. mailwizz license key install
Test API connectivity from your server:
curl -I https://www.mailwizz.com/api/license/verify
Should return HTTP 200.
MailWizz is a self-hosted email marketing application. Unlike SaaS platforms, you download the script and install it on your own server. To remove backend restrictions and access all features (like sending campaigns, managing lists, and using all delivery servers), you must enter a valid MailWizz License Key.
This guide covers:
If everything goes smoothly, the page will reload, and you will no longer see a warning banner at the top of your dashboard regarding the license status.
To double-check that the key took effect: | Error Message | Cause | Solution |
