Roundcube Webmail - Pre-Configured IMAP Client

This is a repackaged open source software product wherein additional charges apply for cloudimg support services.

## Ready-to-Use Roundcube Webmail on AWS EC2

Roundcube is the widely used open source browser-based IMAP mail client, delivering a clean, fast webmail experience with folder management, message threading, rich text composition, address books, message search, and a responsive interface for desktop and mobile. This image delivers Roundcube fully installed, configured, and security-hardened so you have working webmail within minutes of launch, eliminating the hours of manual dependency installation, web server configuration, database setup, and install wizard that a self-managed deployment requires.

## Who This Is For

This image is built for sysadmins, DevOps engineers, and IT teams who need a private, self-hosted webmail front end on EC2. Common scenarios include:

• Consultancies and smaller organizations moving off hosted email who want data sovereignty and full control over their mail client infrastructure without managing a complex install.
• Development and QA teams spinning up isolated mail environments for testing transactional email workflows, webhook integrations, or staging previews.
• Organizations already running workloads on EC2 that want a lightweight webmail portal connected to their existing corporate IMAP and SMTP servers, or to Amazon SES.

## What You Skip

With a standard Roundcube deployment you must install PHP and its extensions, configure a web server, provision a database, import the schema, run the browser installer, remove it again, and connect the client to an IMAP server before anything is usable. This image completes all of that before first boot. Because Roundcube is a mail client rather than a mail store, the image also bundles a local IMAP server and a loopback-only mail transfer agent, so you can sign in, browse folders, and compose mail immediately after launch. You can keep the bundled mailbox or repoint Roundcube at your own corporate IMAP and SMTP servers, or at Amazon SES, by changing two settings, as covered in the deployment guide.

## About Outbound Mail

This image is a complete webmail front end with a local mailbox, not a ready-to-use public mail server. Amazon EC2 throttles outbound TCP port 25 until you request removal, and a new instance has no reverse DNS record and no sending reputation, so mail sent directly to the internet will not be delivered reliably. The bundled mail transfer agent accepts submissions from the loopback interface only and delivers to the local mailbox. To send externally, configure an authenticated relay, for example Amazon SES on port 587, and publish SPF and DKIM records for your domain. The deployment guide walks through both.

## Application Stack

• Roundcube 1.7, the latest stable release
• PHP 8.3 with OPcache and all required extensions
• The nginx web server, serving on port 80, with HTTPS a single certbot command away as covered in the deployment guide
• The MariaDB database engine, holding preferences and contacts
• The Dovecot IMAP server
• A loopback-only Postfix mail transfer agent

The database tier and the mail store each get a dedicated EBS volume, mounted by filesystem UUID and separate from the operating system disk, so each can be resized independently as mail volume grows.

## Security by Default

On first boot, a one-shot service generates a fresh database password, encryption key, database maintenance password, and mailbox password unique to that instance. The mailbox password is written to a root-only file. No shared or default passwords ship in the image. The bundled mail transfer agent is bound to the loopback interface so it can never act as an open relay. The web installer has already been run and removed, so you land directly on the webmail sign-in page.

## Evaluate Quickly

Launch a single instance to explore the full Roundcube interface, test IMAP connectivity, and verify relay configuration before committing to a production deployment.

## 24/7 Expert Support From cloudimg

Compared to free community images, this listing includes around-the-clock expert support covering deployment guidance, IMAP and SMTP configuration, relay and deliverability setup, plugins and skins, upgrades, and MariaDB administration. If you need help connecting Roundcube to your corporate mail infrastructure or configuring Amazon SES as an outbound relay, the cloudimg support team is available to assist.

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