After upgrading to Plesk 18.0.73 dovecot refuses to start. This is because Plesk upgraded dovecot to version 2.4.1-4 which uses a completely different configuration syntax to all previous versions of dovecot. This is fixed in Warden 5.04 released on Oct 12th/2025:
Administrators must first upgrade to Warden 5.04 using our new product updater under Warden -> Settings -> Panel Application -> Application update or using the command below:
plesk bin extension --install-url https://www.danami.com/clients/downloads/warden.zipAfter upgrading to Plesk 18.0.73 and Warden 5.04 run the command below to upgrade the Warden dovecot configuration to the new format required for Plesk 18.0.73:
warden --task=antispam:learning:sieve --rebuild=yes --restart=yesNow the issue should be fixed and dovecot should be running normally.
Upgrading to Warden 5.04 on an End-Of-Life OS
We understand that some users may be using an unsupported operating system that is end-of-life with Warden installed and may still need to upgrade to fix this issue (CentOS 7.x/CloudLinux 7.x/RedHat Enterprise Linux 7.x/Debian 10.x/Ubuntu 20.04). This can be done using the following commands:
// download the latest verion of Warden
wget https://www.danami.com/clients/downloads/warden.zip
// delete the pre-install check from the archive
zip -d warden.zip plib/scripts/pre-install.php
// install the extension
plesk bin extension --install warden.zip
// apply the dovecot fix
warden --task=antispam:learning:sieve --rebuild=yes --restart=yesJust be aware that these end-of-life OS are no longer officially supported by us as they are no longer getting ClamAV signature updates. See here for more information.
