Test Email Server
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 Hello, 
 I installed:
 apt install kopano-backup
 apt install kopano-dagent
 apt install kopano-gateway
 apt install kopano-ical
 apt install kopano-monitor
 apt install kopano-presence
 apt install kopano-search
 apt install kopano-server
 apt install kopano-spooler
 apt install kopano-utils
 apt-get install kopano-coreand now I want to know how can I test the Email server? 
 I cannot find any guide that explain the process.Thanks. 
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 that might help https://kb.kopano.io/display/WIKI/Kopano+Groupware+Installation looks like your missing the webapp too. 
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 Hi, 
 Thanks for your answer.
 Yeah. For whatever reason I cannot run “apt install kopano-webapp”. I got errors.
 Also, I’m using that link to follow the process but:- 
I cannot add this line to kopano.list because I don’t have a license key. 
 deb https://serial:<INSERT_SERIALKEY>@download.kopano.io/supported/core:/final/Debian_10/ ./
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I cannot run “apt install kopano-server-packages”. I got errors. 
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This is what I see when run the last command on for the first step: 
 root@kopano:~# kopano-admin --list-users
 User list for Default(3):
 Username Fullname Homeserver
 ---------------------------------------------
 SYSTEM SYSTEM Unknown
 john john doe
 fabio Fabio Perez
 root@kopano:~# But after this, it doesn’t say that else can I do. or how to check that everything is correct or not. Thanks. 
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 maybe https://documentation.kopano.io/kopanocore_administrator_manual/installing.html gives you an better insight. Might be that some dependencies are missing. If you are running a virtual machine maybe you start over again. What you wrote i looks like the server is running. If the server is running you need to create some users. To test the frontend you need to have your webserver running and install webapp. 
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 Since all your recent postings hover around the same topic, I’ll close here and reply in https://forum.kopano.io/topic/3488/install-kopano-core-issue-debian-10 
