Hi @fanpero,
I think this is a key sentence here:
@fanpero said in Install Kopano Core issue Debian 10:
Because I do not have a license key. I don’t know if without this file I cannot use this tool.
You can only configure and use the private repositories of our stable releases with a valid subscription, and since you do not have this trying to install packages from there will not work (an apt update should already exit with a failure and tell you as much).
So instead of installing our packages you actually installed the packages from the Debian repository (Where kopano-server-packages does not exist, and based on your other postings the same seems to be the case for kopano-webapp).
Instead of having the comfort of a package repository, when you do not have a subscription key you have to download the archives of the desired nightly to your server and then either install the packages with dpkg -i or create a local repository out of these.
@fanpero said in Test Email Server:
and now I want to know how can I test the Email server?
The simplest test would be to send a mail using webapp and receive it back to the same account.