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Go to https://download.savignano.net/snotify/confluence/snapshots
Download the mailer library component (net.savignano.s-notify.confluence.mailer-x.x.x.jar)
Install it in WEB-INF/lib as explained in the official documentation
Restart your Confluence instance
Bitbucket
1: Install the Add-on GUI
Go to https://download.savignano.net/snotify/bitbucket/snapshots
Copy the URL of the GUI component (net.savignano.s-notify.bitbucket.gui-x.x.x.jar)
Go to the Bitbucket Administration page and select Manage apps
On the right of the add-ons search field, click on Upload add-on
At From this URL, paste the URL of the GUI component copied in step 2
2: Install the Mailer Library
Go to https://download.savignano.net/snotify/bitbucket/snapshots
Download the mailer library component (net.savignano.s-notify.bitbucket.mailer-x.x.x.jar)
Install it in app/WEB-INF/lib as explained in the official documentation
Restart your Bitbucket instance