OSS Tanbou
View on GitHub

BillionMail — A self-hosted mail and newsletter platform built around Postfix, Dovecot, and Rspamd

OSS health 57
About these scores

Discovery score is an unbounded weighted, log-compressed index of stars, watchers, forks, and contributors. Growth momentum is its change over the observed period; OSS health is a 0–100 score from available repository recency, Community Health, and release data.

Stars
15,609
Primary language
Go
License
AGPL-3.0
Repository last updated
Jun 11, 2026

Overview

BillionMail combines an SMTP/IMAP mail server, Roundcube webmail, newsletters and email marketing, campaign analytics, and related tooling in an AGPL-3.0 self-hosted stack. Its Docker deployment combines Postfix, Dovecot, Rspamd, PostgreSQL, Redis, and other services. The latest GitHub release checked on September 17, 2026 is v4.9.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

Operate mailboxes and marketing campaigns from the same platform

BillionMail covers mailbox delivery together with contacts and groups, newsletters, campaigns, open/click tracking, API sending, and analytics. Roundcube is integrated for conventional webmail access.

Sources: [2][3]

Compose Postfix, Dovecot, Rspamd, PostgreSQL, Redis, and Roundcube as one self-hosted stack

Postfix handles SMTP, Dovecot handles IMAP/POP, Rspamd provides spam filtering, Roundcube provides webmail, and PostgreSQL/Redis back the persistent application state. Mail data, database data, logs, SSL material, and other state are mounted separately.

Sources: [4]

For organizations that want mail hosting and newsletter/transactional email on infrastructure they control

It fits teams that want mailbox data, contact data, campaigns, and analytics under their own operational control instead of splitting those functions across separate mail and marketing SaaS products.

Sources: [2][4]

Self-hosting the software does not solve email deliverability or compliance by itself

Production email requires operational work around SPF/DKIM/DMARC, PTR/rDNS, TLS, port-25 restrictions, IP/domain reputation, bounce and complaint handling, unsubscribe flows, and applicable marketing-email regulations. Release v4.9 adds controls such as DKIM key selection, tracking disablement, and retention settings, but these do not replace deliverability operations.

Sources: [2][3]

Official sources

  1. [1]Billionmail/BillionMail — GitHub repository metadata(2026-09-17)
  2. [2]BillionMail — README(2026-09-17)
  3. [3]BillionMail v4.9 release(2026-09-17)
  4. [4]BillionMail — docker-compose.yml(2026-09-17)
Supplemental curator note

Evaluate it as an integrated mail and campaign stack rather than interpreting unlimited sending as guaranteed deliverability.

Try it in 3 steps

  1. 1

    Get the source

    git clone --depth 1 https://github.com/Billionmail/BillionMail.git
  2. 2

    Enter the repository

    cd BillionMail
  3. 3

    Check the official steps

    Continue with the commands in the README Installation, Quick Start, or Getting Started section.

    find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Check the official README

Growth

Growth trends · Last 30 days

15,609 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
0
Open PRs
13

Development activity is still being collected.

Built with

Categories and tags

Categories

Tags

GitHub data

GitHub dataView detailed GitHub data
View on GitHub

GitHub Topics

  • email-marketing
  • mail
  • mailserver
  • email
  • server
  • smtp
  • dovecot
  • postfix
  • rspamd
  • newsletter
  • newsletters
Stars
15,609
Forks
1,702
Watchers
70
Open issues
226
Primary language
Go
License
AGPL-3.0
Repository last updated
Jun 11, 2026
Write a related article

Share a guide or use case for this OSS in Markdown. Articles are published after administrator approval.

Report incorrect information

Tell us if any listing information is incorrect or outdated.