@Marco , any chance you could share how you clustered the Mailcleaner? Are you using the OS version?

Hello,

You just cluster it the "normal" way (and yes we always use the opensource version our selfs).

Basically Mailcleaner is clusterable out of the box, you might need to configure hostname etc in hosts before setting it up so they resolve properly.

SolidCP just needs the api url (which should always be on the master which has all the settings that replicate to the slave aka secondary mailcleaner).

If you run into any issues just let us know, i am sure we can guide you on how to set it up further from there.

Regards,

Marco