Add info about automatic backups

docs/b_n_r_accidental_deletion.md

@@ -0,0 +1,40 @@
+So you deleted a mailbox and have no backups, he?
+
+If you noticed your mistake within a few hours, you can probably recover the users data.
+
+### SOGo
+
+We automatically create daily backups (24h interval starting from running up -d) in `/var/lib/docker/volumes/mailcowdockerized_sogo-userdata-backup-vol-1/_data/`.
+
+**Make sure the user you want to restore exists in your mailcow**. Re-create them if they are missing.
+
+Copy the file named after the user you want to restore to `__MAILCOW_DIRECTORY__/data/conf/sogo`.
+
+1\. Copy the backup: `cp /var/lib/docker/volumes/mailcowdockerized_sogo-userdata-backup-vol-1/_data/restoreme@example.org __MAILCOW_DIRECTORY__/data/conf/sogo`
+
+2\. Run `docker-compose exec -u sogo sogo-mailcow sogo-tool restore -F ALL /etc/sogo restoreme@example.org`
+
+Run `sogo-tool` without parameters to check for possible restore options.
+
+3\. Delete the copied backup by running `rm __MAILCOW_DIRECTORY__/data/conf/sogo`
+
+4\. Restart SOGo and Memcached: `docker-compose restart sogo-mailcow memcached-mailcow`
+
+### Mail
+
+In case of an accidental deletion of a mailbox, you will be able to recover for (by default) 5 days. This depends on the `MAILDIR_GC_TIME` parameter in `mailcow.conf`.
+
+A deleted mailbox is copied in its encrypted form to `/var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/_garbage`.
+
+The folder inside _garbage follows the structure `[timestamp]_[domain_sanitized][user_sanitized]`, for example `1629109708_exampleorgtest in case of test@example.org deleted on 1629109708.
+
+To restore make sure you are actually restoring to the same mailcow it was deleted from or you use the same encryption keys in `crypt-vol-1`.
+
+**Make sure the user you want to restore exists in your mailcow**. Re-create them if they are missing.
+
+Copy the folders from `/var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/_garbage/[timestamp]_[domain_sanitized][user_sanitized]` back to `/var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/[domain]/[user]` and resync the folder and recalc the quota:
+
+```
+docker-compose exec dovecot-mailcow doveadm force-resync -u restoreme@example.net '*'
+docker-compose exec dovecot-mailcow doveadm quota recalc -u restoreme@example.net
+```

mkdocs.yml

@@ -62,6 +62,8 @@ nav:
   - 'Manually':
     - 'Maildir': 'u_e-backup_restore-maildir.md'
     - 'MySQL': 'u_e-backup_restore-mysql.md'
+  - 'Automatic backups'
+    - 'Recover accidentally deleted data': 'b_n_r_accidental_deletion.md'
 - 'Manual/Guides/Examples':
   - 'mailcow UI':
     - 'Configuration': 'u_e-mailcow_ui-config.md'