Article ID: 121429, created on May 1, 2014, last review on Jun 17, 2016

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.5 for Linux


The following error appears when attempting to open Settings > Filter in Roundcube webmail:

    Could not connect to Sieve server 

Could not connect to Sieve server


Sieve filter is not supported in Plesk 11.5 or older versions. In Plesk 12, Sieve support is provided with Dovecot. A feature request with ID RT #1827961 has been created for the Plesk Service Team and will be considered for inclusion in a future product version.


For Plesk 12:

Switch from Courier IMAP to Dovecot using Plesk autoinstaller: Home > Tools & Settings > Updates & Upgrades > Add\Remove components > Mail > Dovecot.

More about Dovecot is available in developers blog.

More information is available on forums.

Please also see Plesk 12 Release notes.

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rouncube sieve

a914db3fdc7a53ddcfd1b2db8f5a1b9c 56797cefb1efc9130f7c48a7d1db0f0c 01bc4c8cf5b7f01f815a7ada004154a2 29d1e90fd304f01e6420fbe60f66f838 0a53c5a9ca65a74d37ef5c5eaeb55d7f 2a5151f57629129e26ff206d171fbb5f e335d9adf7edffca6a8af8039031a4c7

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