Base
Hardened build
minimal ports, security patches applied at build time
Roundcube 1.7 Webmail on Ubuntu 24.04 LTS
Azure
Streaming & Messaging
Roundcube, the browser based IMAP webmail client, with a working mailbox and a clean, responsive interface ready on first boot.
Overview
Roundcube is the widely used open source webmail client. It gives users a fast, full featured mail experience in the browser: folder management and drag and drop message filing, threaded conversations, a rich text composer with attachments and drafts, a searchable address book with contact groups, message search across folders, and a responsive Elastic interface that adapts from desktop to phone. Because it speaks standard IMAP and SMTP, it puts a modern face on any compliant mail server without changing where mail is stored.
It suits organisations that want to offer staff browser based access to their existing corporate mail server, and teams that want a private, self hosted alternative to a hosted webmail service.
Why the cloudimg image
Roundcube is a mail client rather than a mail store, so a bare install has nothing to sign in to. cloudimg therefore delivers Roundcube complete with a local IMAP server and a mail transfer agent bound to loopback, so you can sign in, browse folders and compose a message minutes after launch, then repoint it at your own corporate mail server by changing two settings. The web installer is run and removed at build time so no setup wizard is exposed. On every instance's first boot a one shot service generates a unique database password, a fresh encryption key for stored session passwords and a unique mailbox password written to a file only the root user can read, so no shared or default credential ships in the image. Mail data and the Roundcube database both live on a dedicated data disk kept separate from the operating system disk, and every deployment is paired with a step by step deploy guide and backed by 24/7 support.
Common uses
- Browser based webmail for an existing corporate IMAP mail server
- A private, self hosted webmail service you fully control
- Mobile friendly mail access without deploying a desktop mail client
See it running
Real screenshots taken while testing this image against its deployment guide.
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