Base
Hardened build
minimal ports, security patches applied at build time
BillionMail on Ubuntu 24.04 LTS
Azure
Streaming & Messaging
a complete self hosted mail server and email marketing platform: SMTP, IMAP, spam filtering and a web console in one stack
Overview
BillionMail is an open source, self hosted mail server combined with a newsletter and email marketing platform. It bundles Postfix for sending and receiving, Dovecot for IMAP and POP3 mailbox access, Rspamd for spam scoring and DKIM signing, PostgreSQL and Redis for storage and rate limiting, and a bundled Roundcube webmail client, all fronted by a single web console for managing domains, mailboxes, templates and marketing campaigns. It gives a team full control of both its mailboxes and its outbound email campaigns on infrastructure it owns, with no per message fees and no third party seeing the mailing list.
Why the cloudimg image
The cloudimg image runs the upstream release as the official container stack, so the version never drifts under you. Nothing ships with a known credential: the image contains no configuration and no database at all, and on first boot it generates a unique admin password, an unguessable console entrance path, fresh database and Redis passwords, a per instance DKIM key and a per instance TLS certificate carrying the instance's own hostname. A demo domain and mailbox are seeded so the console is usable from the first login, and every per instance value is written to a root only file. The paired deploy guide covers the platform's outbound port 25 restriction honestly and walks through pointing a real domain and its DNS records at the server. Backed by 24/7 cloudimg support.
Common uses
- Run your own mail server for a domain you control, mailboxes and webmail included
- Send newsletters and marketing campaigns from infrastructure you own
- Keep transactional and notification email in house with full deliverability control
See it running
Real screenshots taken while testing this image against its deployment guide.
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