Responsive by design
A readable inbox on desktop, tablet, and mobile, with navigation designed for touch.
Roundcube, refined
Actively maintained
Cybrense UI layer
Production-ready webmail
CBS Mail
A polished, mobile-first webmail experience built on Roundcube's proven IMAP foundation.
- Responsive by default
- Installable PWA
- GPL-3.0 licensed
Desktop + mobile
One focused experience across every screen
PWA ready
Installable on desktop and mobile devices
IMAP / SMTP
Roundcube's proven mail foundation
GPL-3.0
Public code and open contributions
A proven engine, a better experience
Roundcube, refined for modern work
CBS Mail keeps Roundcube as the IMAP client and adds a complete interface layer: clear navigation, responsive views, synced labels, and a focused app-like experience.
Features
Everything a modern webmail should deliver
A consistent experience across sign-in, inbox, message view, compose, contacts, and settings.
Synced labels
Add or remove labels in one click, assign multiple labels per message, and keep them tied to each account.
Installable PWA
Manifest, icons, and service worker support provide fast access from desktop or a mobile home screen.
Privacy you can see
Remote content stays blocked by default, with clear controls for each message or trusted sender.
Browser notifications
New-message alerts use Roundcube's official notification flow and remain configurable per account.
Docker deployment
Reproducible images, health checks, environment-based configuration, and backup scripts.
Mobile and PWA
The same webmail, genuinely usable on mobile
Lists, tools, and messages adapt to the available space. Essential actions remain accessible without zooming or horizontal scrolling.
- Touch-friendly message cards
- Mobile navigation drawer
- Dates, labels, and states stay visible
- Home-screen installation
Architecture
A focused interface layer, not another mail server
CBS Mail is a reskin and enhancement layer for Roundcube. Your IMAP and SMTP infrastructure remains fully independent.
- Browser / PWAUser experience
- CBS Mail UISkin, plugin, and labels
- RoundcubeIMAP webmail client
- IMAP / SMTPMail infrastructure
Quick start
Run CBS Mail with Docker
Clone the project, configure your IMAP and SMTP services in
.env, then start the stack.
Terminal
git clone https://github.com/MrBoodj011/CBS_Mail.git
cd CBS_Mail
cp .env.example .env
docker compose up -d --buildOpen to contributions
An open-source project built in the open
The code, documentation, tests, and technical decisions are public. Bug reports, ideas, and pull requests are welcome.