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roundcubemail/docker
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README.md

Running Roundcube in a Docker Container

The simplest method is to run the official image:

docker run -e ROUNDCUBEMAIL_DEFAULT_HOST=mail -d roundcube/roundcubemail

Configuration/Environment Variables

The following env variables can be set to configure your Roundcube Docker instance:

ROUNDCUBEMAIL_DEFAULT_HOST - Hostname of the IMAP server to connect to

ROUNDCUBEMAIL_DEFAULT_PORT - IMAP port number; defaults to 143

ROUNDCUBEMAIL_SMTP_SERVER - Hostname of the SMTP server to send mails

ROUNDCUBEMAIL_SMTP_PORT - SMTP port number; defaults to 587

ROUNDCUBEMAIL_PLUGINS - List of built-in plugins to activate. Defaults to archive,zipdownload

ROUNDCUBEMAIL_UPLOAD_MAX_FILESIZE - File upload size limit; defaults to 5M

By default, the image will use a local SQLite database for storing user account metadata. It'll be created inside the /var/www/html volume and can be backed up from there. Please note that this option should not be used for production environments.

Connect to a MySQL Database

The recommended way to run Roundcube is connected to a MySQL database. Specify the following env variables to do so:

ROUNDCUBEMAIL_DB_TYPE - Database provider; currently supported: mysql, pgsql, sqlite

ROUNDCUBEMAIL_DB_HOST - Host (or Docker instance) name of the database service; defaults to mysql or postgres depending on linked containers.

ROUNDCUBEMAIL_DB_USER - The database username for Roundcube; defaults to root on mysql

ROUNDCUBEMAIL_DB_PASSWORD - The password for the database connection

ROUNDCUBEMAIL_DB_NAME - The database name for Roundcube to use; defaults to roundcubemail

Before starting the container, please make sure that the supplied database exists and the given database user has privileges to create tables.

Run it with a link to the MySQL host and the username/password variables:

docker run --link=mysql:mysql -d roundcube/roundcubemail

Advanced configuration

Apart from the above described environment variables, the Docker image also allows to add custom config files which are merged into Roundcube's default config. Therefore the image defines a volume /var/roundcube/config where additional config files (*.php) are searched and included. Mount a local directory with your config files - check for valid PHP syntax - when starting the Docker container:

docker run -v ./config/:/var/roundcube/config/ -d roundcube/roundcubemail

Check our wiki for a reference of Roundcube config options.

Building a Docker image

Use the Dockerfile in this directory to build your own Docker image. It pulls the latest build of Roundcube Webmail from the Github download page and builds it on top of a php:7.1-apache Docker image.

Build it from this directory with

docker build -t roundcubemail .