How to enable Roundcube plugins in Plesk for Linux?

Updated April 16, 2025 01:12

kb: how-to

Applicable to:

How to install and enable Roundcube plugins, for example, to be able to download multiple attachmetns at once?

How to download multiple attachments at once?

By default, Roundcube plugins are stored in the directory /usr/share/psa-roundcube/plugins.

A non-exhaustive list of plugins can be seen below:

zipdownload: adds an option to download all attachments to a message in one zip file, when a message has multiple attachments. The plugin also allows the download of a selection of messages in one zip file.
password: adds a possibility to change user password using many methods (drivers) via Settings/Password tab.
enigma: adds support for viewing and sending of signed and encrypted messages in PGP (RFC 2440) and PGP/MIME (RFC 3156) format.

To enable a specific plugin, follow these steps:

Roundcube plugin enablement steps

Connect to a Plesk server via SSH.
Make sure the plugin you want to use is already available at the folder /usr/share/psa-roundcube/plugins.
Open the file /usr/share/psa-roundcube/config/defaults.inc.php using vi or your preferred text processor.
There are two ways to proceed now, depending on whether the line $config['plugins'] is already added into the file.
- If the file already has $config['plugins'], you may add the name of the plugin as an extra array value (within single quotes and separated by commas):
```
  $config['plugins'] = array('zipdownload','archive'); 
```
- If the file does not have $config['plugins'], you may add it now in a new line:
```
  $config['plugins'] = array('zipdownload');
```
  Warning: Please make sure there are no duplicate $config['plugins'], since this may cause issues with Roundcube.
Restart the Dovecot service:

# service dovecot restart

The plugins are now enabled and ready to use.