SymptomsAfter logging out of the Horde webmail, users see unclear messages in the wrong encoding.
CauseIt appears if customer selected a locale in Horde which is not generated in the system. Usually, on RPM-based systems all locales are generated, but on Debian-based systems,only the minimum number of locales are ready for use.
ResolutionInstall locale used by the customer:
1. Install locale packages.
2. Modify /etc/locale.gen and run locale-gen.
3. Restart Apache.