mschneider82/roundcube-opencloud

Roundcube plugin to connect each user's personal OpenCloud Space — save attachments to the cloud or attach files from it

v0.0.6 2026-03-13 09:01 UTC

Requires

• php: >=8.1
• league/flysystem: ^3.0
• league/flysystem-webdav: ^3.29
• roundcube/plugin-installer: >=0.3.0
• sabre/dav: ^4.6

AGPL-3.0-or-later

• Matthias Schneider

README

A Roundcube plugin that lets each user connect their personal OpenCloud Space to Roundcube — save email attachments directly to the cloud or attach files from it.

This is a fork of nicofrand/Roundav, which itself is a fork of Roundcube-Plugin-roundav.

Packagist: https://packagist.org/packages/mschneider82/roundcube-opencloud Repository: https://github.com/mschneider82/roundcube_opencloud_plugin

Related: opencloud-webmail — OpenCloud web extension that embeds Roundcube directly inside the OpenCloud UI via iframe with HMAC autologin.

Article: From Seafile to OpenCloud: Building a Self-Hosted Webmail & Cloud Integration on Kubernetes — background, motivation, and full setup walkthrough.

Features

• Save email attachments to your personal OpenCloud Space
• Attach files from your OpenCloud Space when composing emails
• Each user configures their own Space — no shared credentials needed
• Supports OpenCloud Spaces WebDAV URLs (including Space IDs with $)

Requirements

• Roundcube 1.6+
• PHP 8.1+
• An OpenCloud instance

Installation

Docker (roundcube/roundcubemail image)

Set these environment variables:

ROUNDCUBEMAIL_PLUGINS=archive,zipdownload,roundcube_opencloud
ROUNDCUBEMAIL_COMPOSER_PLUGINS=mschneider82/roundcube-opencloud
ROUNDCUBEMAIL_INSTALL_PLUGINS=1

Composer

composer require mschneider82/roundcube-opencloud

Then add roundcube_opencloud to $config['plugins'] in your Roundcube config.

Manual

1. Place this plugin folder into the plugins/ directory of Roundcube and rename it to roundcube_opencloud.
2. Run composer install --no-dev inside the plugin folder.
3. Add roundcube_opencloud to $config['plugins'] in your Roundcube config.

Configuration

The plugin works out of the box — all settings are optional. To override global defaults, edit config.inc.php:

// Show the "Files" tab in the taskbar (default: true)
$rcmail_config['show_drive_task'] = true;

// Optional: set a global fallback Spaces URL (users can override this in their settings)
$rcmail_config['driver_webdav_spaces_url'] = null;

// Optional: set global WebDAV credentials (not recommended — use per-user settings instead)
$rcmail_config['driver_webdav_username'] = null;
$rcmail_config['driver_webdav_password'] = null;

User Setup

Each user configures their own OpenCloud Space in Roundcube under Settings → Cloud Storage:

1. Create an App Password in OpenCloud

Regular OpenCloud passwords do not work for WebDAV. You need to create an app password:

1. Log in to OpenCloud
2. Go to Settings → Security
3. Under App Passwords, create a new password and copy it

2. Find your Spaces WebDAV URL

1. In OpenCloud, go to Settings and enable "Show WebDAV information in the detail view"
2. Open the Space you want to use and click on its properties/details
3. Copy the WebDAV URL — it looks like:

   https://opencloud.example.com/remote.php/dav/spaces/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx$xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
   

3. Configure in Roundcube

1. In Roundcube, go to Settings → Cloud Storage
2. Enter your OpenCloud username
3. Enter the app password you created (not your regular password)
4. Paste the Spaces WebDAV URL
5. Save

You can now attach files from your Space or save attachments to it directly from the mail view.

License

Released under the GNU Affero General Public License Version 3.