• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Issue Horde Webmail - Mail server closed the connection unexpectedly

Hi Marcio Nunes,

there could be several root causes, why you should consider to post at least the necessary informations for further investigations:

Output of the command:
Code:
plesk version

Pls. post your corresponding entries from "/var/log/messages" ( for CentOS/RHEL - based systems ), or "var/log/syslog" ( on Debian/Ubuntu - based systems ).

Pls. post your corresponding entries from "/var/log/psa-horde/psa-horde.log".

Pls. check possible corresponding entries from your webserver "error_log".

Pls. check possible corresponding entries from "/var/log/audit/audit.log"

Do you use SELinux on your server? Did you check that there are no misconfigurations, IF YOU USE SELinux?​
 
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