• The BIND DNS server has already been deprecated and removed from Plesk for Windows.
    If a Plesk for Windows server is still using BIND, the upgrade to Plesk Obsidian 18.0.70 will be unavailable until the administrator switches the DNS server to Microsoft DNS. We strongly recommend transitioning to Microsoft DNS within the next 6 weeks, before the Plesk 18.0.70 release.
  • The Horde component is removed from Plesk Installer. We recommend switching to another webmail software supported in Plesk.

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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