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 ### [20.1 Installation & Update](https://github.com/EGroupware/egroupware/wiki/20.1--Installation-using-egroupware-docker-RPM-DEB-package)
 20.1 contains an additional push-server container and runs - for new installations - MariaDB 10.4 in a container too.
+* [General information](https://github.com/EGroupware/egroupware/wiki/20.1--Installation-using-egroupware-docker-RPM-DEB-package)
+* [Configure IMAP server to notify EGroupware about newly arriving mails](https://github.com/EGroupware/egroupware/wiki/IMAP-Push-Notifications)
 
 ### [19.1 Installation & Update](https://github.com/EGroupware/egroupware/wiki/19.1--Installation-using-egroupware-docker-RPM-DEB-package)
 The 19.1+ installation is based on **Docker**, even for the DEB or RPM packages.