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MAIL & COMMUNICATION · PRO TIER

Roundcubepro

Roundcube is a browser-based IMAP client — the most widely deployed self-hosted webmail interface in the world. PHP-based, MySQL-backed, with a desktop-class UI, drag-and-drop messaging, address book, custom themes. Drop-in webmail for any IMAP-compatible mail server.

Install via WHMCS → Visit roundcube.net ↗

📧 Mail & Communication Min 512 MB RAM Port 8000 (http) Tier pro

// What it is

A closer look.

For mail providers needing a webmail UI, Roundcube is the universal choice.

// Use cases

What it's for.

Concrete scenarios where teams pick Roundcube over the SaaS alternative.

◆

Webmail interface

browser access to IMAP mailboxes

◈

Multi-mailbox UI

single login, multiple accounts

◇

Address book

contacts management with CardDAV sync

▣

HTML email composition

rich text editor for composition

▦

Mobile-friendly UI

responsive design for phones / tablets

// Who it's for

Built for these teams.

If your team profile matches one of these, Roundcube is a strong fit out of the box.

Profile A

Mail server operators

providing webmail to users

Profile B

Hosting providers

offering webmail with shared hosting plans

Profile C

Privacy-bound orgs

running internal webmail

Profile D

Small businesses

with on-prem mail servers

Profile E

Self-hosters

accessing personal mail via browser

// Differentiators

Why teams pick Roundcube.

When evaluating self-hosted options for this category, here are the dimensions on which Roundcube consistently lands above the alternatives.

✓GPL-3.0 — fully open
✓Universal compatibility — any IMAP server works
✓Theme + plugin ecosystem — customizable for branding
✓Mature — production-deployed at scale for 15+ years
✓i18n complete — translated to 80+ languages
✓Lightweight — runs on minimal hardware

// Integrations

Connects to.

The stack you'll plug Roundcube into — services, protocols, and adjacent apps in the BluixApps catalog.

◇

IMAP backends

Dovecot, Cyrus, Courier-IMAP, any IMAP4

◈

SMTP

any SMTP server for sending

◆

Auth

IMAP-pass-through, LDAP, SSO via reverse proxy

▣

Address book

CardDAV sync for contact integration

▦

Plugins

calendar, two-factor auth, encryption, custom themes

▩

Database backends

MySQL, Postgres, SQLite

▼

Spam filters

Sieve filter management via UI

// Adoption & deployment

Notable users & community

6k+ GitHub stars
Default webmail in cPanel, Plesk, virtualmin shared hosting
Used by countless hosting providers worldwide
Active community + plugin marketplace
Long-running OSS project (>17 years)

What we ship

Docker compose: Roundcube + MariaDB
Pinned roundcube/roundcubemail:1.6 (release-tagged)
HTTPS via Let's Encrypt
Admin via env config
Persistent MariaDB + plugins volume
Sample config for common IMAP backends documented
Backup hook covers MariaDB

// Tips & operations

Run it properly.

Operational guidance from running this in production — what to do before you scale, what to lock down, what surprises people.

// PERFORMANCE

Persistent volume for config + storage

config.inc.php and mail storage

// SECURITY

HTTPS only

never run Roundcube on plain HTTP; password leak risk

// OPERATIONS

Configure SMTP correctly

sending depends on IMAP + SMTP both configured

// RELIABILITY

DKIM signing

if you run the mail server, ensure DKIM is signing outbound

// DEPLOYMENT

Backup is database + config

sessions + drafts in DB; users in IMAP

// SCALING

Update regularly

webmail is internet-facing; patch frequently

512

// min ram (MB)

// min disk (GB)

8000

// access port

http

// protocol

pro

// bluixapps tier

8000:80 · roundcube/roundcubemail:latest

// docker image

Project resources

Official siteroundcube.net ↗

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