- Plesk Onyx for Linux
- Horde filters like forward and auto-reply are missing in Horde Mail > Filters.
- Plesk was upgraded from 17.5 to 17.8.
This is a Plesk bug with ID #PPPM-8861 which will be fixed in the future product updates.
Reinstall/reconfigure Horde package
# yum reinstall psa-horde psa-imp psa-ingo -y
# dpkg-reconfigure psa-horde psa-imp psa-ingo
Note: It is possible to avoid the issue by enabling all filters in Horde before the upgrade.