__IMPORTANT NOTES__: If you're running Policyd-1.8, please stay with it right now. Be patient and wait for our upgrade tutorial if you want to upgrade to Cluebringer. P.S. Policyd doesn't provide upgrade tutorial officially.
## ChangeLog
* 2014-01-08: Remove backup mx related sections, it's wrong.
* 2013-12-17: New section: Alter Cluebringer database.
* 2013-12-17: public release.
* 2013-11-30: Check whether hosted domain is backup mx or not in Postfix transport map query.
* 2013-09-14: Add cron job to cleanup Cluebringer database.
* 2013-09-2: Enable Opportunistic TLS support in Postfix when sending mail to remote SMTP server.
* 2013-08-25: Upgrade Roundcube to 0.9.3.
## General (All backends must apply these steps)
### Update /etc/iredmail-release with iRedMail version number
iRedMail stores the release version in `/etc/iredmail-release` after
installation, it's recommended to update this file after you upgraded iRedMail,
so that you can know which version of iRedMail you're running. For example:
```
# File: /etc/iredmail-release
0.8.6
```
### Upgrade Roundcube webmail to the latest stable release
Please follow Roundcube official tutorial to upgrade Roundcube webmail to the
latest stable release immediately: [How to upgrade Roundcube](http://trac.roundcube.net/wiki/Howto_Upgrade)
### Upgrade iRedAPD (Postfix policy server) to the latest stable release
Please follow below tutorial to upgrade iRedAPD to the latest stable release: