iredmail-doc/en_US/upgrade/0-upgrade.iredapd.md

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# Upgrade iRedAPD
!!! attention
* Release Notes are available here: [iRedAPD Release Notes](./iredapd.releases.html).
!!! warning
* iRedAPD-4.0 and later releases __require Python 3.5+__, only listed
distribution releases are qualified to upgrade:
- CentOS 7 and later
- Debian 9 and later
- Ubuntu 18.04 and later
- FreeBSD with latest ports tree
- OpenBSD 6.6 and later
If you're running an old Linux/BSD release which doesn't have Python
3.5+, please stay with iRedAPD-3.6, it's the last release supports Python
2. if you need to upgrade to iRedAPD-3.6, please follow this upgrade
tutorial instead: [Upgrade iRedAPD from v1.4.0 or later releases to v3.6](./upgrade.iredapd.py2.html).
This tutorial describes how to upgrade iRedAPD from `1.4.0` or later releases
to the latest stable release on listed distribution releases listed above.
Run commands below on your iRedMail server:
```
cd /root
wget -O iRedAPD-4.6.tar.gz https://github.com/iredmail/iRedAPD/archive/4.6.tar.gz
tar zxf iRedAPD-4.6.tar.gz
cd iRedAPD-4.6/tools/
bash upgrade_iredapd.sh
```
That's all.
## See Also
* [Enable SRS (Sender Rewriting Scheme) support](./srs.html)