Roundcube 1.4 beta released

Published: 25 August 2018

We proudly announce the beta release of the next major version 1.4 of Roundcube webmail. With this milestone we introduce some new features:

  • New responsive skin with mobile support
  • Email Resent (Bounce) feature
  • Improved Mailvelope integration
  • Support for Redis cache
  • Support for SMTPUTF8

Because the new responsive skin is not yet fully completed, it’s not enabled by default. In order to make it the default for your users, change your accordingly:

$config['skin'] = 'elastic';

Although it still needs some polishing, the new skin solves the urgent need to enable access to Roundcube for mobile devices. The plugin elastic4mobile makes it the default for mobile devices while keeping the configured default for desktop browsers.

The Elastic skin is built with LESS and of course the sources are included. They allow a certain degree of customization by adjusting some color variables. All you need is to compile your very own customized skin with lessc.

See the full changelog in the release notes on the Github download page.

This is a beta release and we recommend to test it on a separate environment. And don’t forget to backup your data before installing it. Download it from

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