# YunoHost 4.0 (Buster) release / Sortie de YunoHost 4.0 (Buster)

**URL:** https://forum.yunohost.org/t/yunohost-4-0-buster-release-sortie-de-yunohost-4-0-buster/12195
**Category:** Announcements
**Tags:** ynh\_release
**Created:** [July 29, 2020, 5:00pm UTC](https://forum.yunohost.org/t/yunohost-4-0-buster-release-sortie-de-yunohost-4-0-buster/12195 "2020-07-29T17:00:00Z")
**Posts on this page:** 1
**Showing post:** 39

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### Author: ![Skylar](https://forum.yunohost.org/letter_avatar_proxy/v4/letter/s/b487fb/32.png) [@Skylar](https://forum.yunohost.org/u/Skylar)
#### Post date: [July 31, 2020, 10:35am UTC](https://forum.yunohost.org/t/yunohost-4-0-buster-release-sortie-de-yunohost-4-0-buster/12195/39 "2020-07-31T10:35:15Z")

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Wow, that went smooth!

Pretty much all my applications migrated successfully, and I control a fully packed server!

What failed:

- SoGo, even after re-installation, only gives me: ‘No mailbox selected’. Even adding an IMAP account manually does not work. Roundcube on the otherhand works fine. I would gladly provide any logs/information, but I dont know where to find what you need.
- Synapse failed. Initially it worked after manually starting it (didn’t work straight after migration). But after a restart of my server it would not boot up anymore. In alpha somebody had the exact same problem and logs: [Alpha-stage testing for YunoHost 4.0 on Debian Buster (and migration shipped in Yunohost 3.8.5)](https://forum.yunohost.org/t/alpha-stage-testing-for-yunohost-4-0-on-debian-buster-and-migration-shipped-in-yunohost-3-8-5/11766/5). Installing from backup did not work either. Same errors. Fresh install does work.
- Monitorix would not open 404… I forgot to look for any logs… re-installing fixed it and that was like 10 seconds of my time…

What I noticed right away after the update: my server was running a lot more healty/streamlined! Awesome!! Thank you guys so much! Im looking forward in contributing any way I can.

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