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Curious to know what parts are open source (client, server) and where that code is viewable.
Curious to know what parts are open source (client, server) and where that code is viewable.
The same question 
Mailsystems (Postfix, Dovecot, Anti-Spam-Engines) are common known open source software, available on every linux distribution.
Webmail-System/*DAV-Server are also open source software, available from Open Xchange.
Internal backend infrastructure ("Glue", internal API-Server, backup scripts, maintenance scripts, anti abuse detection systems, process logic) are developed by us and not open source.
Mailsystems (Postfix, Dovecot, Anti-Spam-Engines) are common known open source software, available on every linux distribution.
Webmail-System/*DAV-Server are also open source software, available from Open Xchange.
Internal backend infrastructure ("Glue", internal API-Server, backup scripts, maintenance scripts, anti abuse detection systems, process logic) are developed by us and not open source.
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