Colossus — Self-Hosted Email Marketing
MIT-licensed Django email marketing platform: subscriber management, campaign builder, open/click tracking, and segmentation — fully self-hosted.
Colossus — Self-Hosted Email Marketing
Colossus is a self-hosted email marketing solution built with Django and Python. It provides a full newsletter and campaign management workflow — subscriber import and management, HTML/text campaign authoring, list segmentation, automated open and click tracking, unsubscribe handling, and per-campaign analytics — all under the MIT license with no per-email fees.
Key Features
- Subscriber management: import CSV, double opt-in, unsubscribe workflows
- Campaign builder: HTML editor + plain-text fallback
- Segment subscribers by tag or custom attribute for targeted campaigns
- Open and click tracking with campaign-level analytics
- SMTP relay support (SendGrid, Mailgun, SES, self-hosted Postfix)
- Django admin for full database management
Quick Start
git clone https://github.com/vitorfs/colossus
cd colossus
pip install -r requirements.txt
python manage.py migrate
python manage.py createsuperuser
python manage.py runserver
Open http://localhost:8000/accounts/login/ and log in to create your first email list and campaign.
npx ai-supply add colossus-email-marketing
Curated mirror of the open-source Colossus (MIT). Get it from the source.
Compromise signals — malicious or tampered code (leaked secrets, backdoors, a dropped executable) — reduce the score, and known dependency CVEs carry a bounded penalty (they warrant review but never QUARANTINE — update the dependency to clear). Other dangerous-by-capability traits are risk surface, expected for some capabilities. Every finding is mapped to its OWASP control below.
Findings mapped to the OWASP Top 10 for LLM Applications (2025) and the OWASP Machine Learning Security Top 10. Expand any flagged control for the exact findings — compromise reduces the score; expected/risk-surface do not, except a known CVE, which carries a small bounded penalty (high/critical → Review).
The same gate an agent runs before installing (POST /api/v1/trust/colossus-email-marketing/check). Click a policy:
Consume Colossus — Self-Hosted Email Marketing programmatically. Authenticate with an API key or session — see Authorize an agent.
# Agents: CHECK BEFORE YOU INSTALL (no auth) — score, grade, level, capability manifest
curl https://ai-supply.store/api/v1/trust/colossus-email-marketing
# Gate against your org policy (returns { pass, violations })
curl -X POST https://ai-supply.store/api/v1/trust/colossus-email-marketing/check \
-H "Content-Type: application/json" \
-d '{"minGrade":"B","denyPermissions":["shell"],"denyUnknownEgress":true}'
# CLI
npx ai-supply add colossus-email-marketing
# REST (install → download)
curl -X POST https://ai-supply.store/api/v1/listings/colossus-email-marketing/install \
-H "Authorization: Bearer $AIM_KEY"
# MCP tool
install_listing({ "slug": "colossus-email-marketing" })OpenAPI spec →Curated mirror — latest upstream source. See the repository for tagged releases.