Search Engine: Elastic

Article ID: 127366, created on Nov 9, 2015, last review on Jul 14, 2018

  • Applies to:
  • Plesk Automation 11.5


The following error displays when attempting to configure filters in Roubcube webmail:

Unable to connect to Sieve server. 



The behavior was caused by software issue #PPA-2611 "Filters based on SieveRules plugin in Roundcube settings are not working".

The fix is considered to be included in one of the next PA updates.

Please use provided ID to track maintenance in Plesk Automation release notes.

Subscribe to our knowledge base - each product update comes with corresponding KB article:


To disable SieveRules plugin:

  1. Backup the original Roundcube configuration file on Webmail Service node:

    cp /usr/share/psa-roundcube/config/{,.backup}
  2. Open the file and remove sieverules from settings of $rcmail_config parameter:

    // ----------------------------------
    // PLUGINS
    // ----------------------------------
    // List of active plugins (in plugins/ directory)
    $rcmail_config['plugins'] = array('password', 'markasjunk2', 'sieverules');

    So that it looks as below:

    $rcmail_config['plugins'] = array('password', 'markasjunk2');

33a70544d00d562bbc5b17762c4ed2b3 caea8340e2d186a540518d08602aa065 e0aff7830fa22f92062ee4db78133079

Email subscription for changes to this article
Save as PDF