Email Marketing

iRedMail is a full-featured mail server with a shell installer. Postfix, Dovecot, SpamAssassin, ClamAV, Amavis, Roundcube/SOGo webmail. Supports OpenLDAP, MySQL, Postgres backends.

Listmonk is a high-performance, self-hosted newsletter and mailing list manager. It handles 1M+ subscribers on a single $5/mo VPS, has a beautiful campaign builder, segmentation, analytics, and bounce/complaint handling. Used by HN readers, indie writers, and small media companies.

Mailcow is a self-hosted mail server in a Docker stack. Postfix, Dovecot, SOGo webmail, Rspamd anti-spam, full-stack with one docker-compose. The easiest full mail server to deploy.

Mailu is a simple, full-featured mail server in Docker. Postfix, Dovecot, Rspamd, Nginx, Admin UI, full DKIM/SPF/DMARC. Designed for small organizations and families.

Mautic is the world's largest open source marketing automation platform. Email campaigns, drip workflows, landing pages, forms, lead scoring, contact segmentation, and multi-channel campaigns. 200K+ marketers use it. Self-hostable PHP/MySQL.

Postal is a complete open source mail server. SMTP for sending, IMAP/POP3 for receiving, webhooks for bounces/complaints, click/open tracking. The self-hosted SendGrid.

Sendy is a self-hosted email newsletter app that uses Amazon SES for delivery. Beautiful UI, autoresponders, segmentation, analytics. One-time $69 license, not monthly.

Stalwart is a modern mail server written in Rust. JMAP, IMAP4, SMTP, Sieve filtering, built-in anti-spam, full-text search, directory integration. The all-in-one mail platform.

WildDuck is a distributed IMAP/POP3 mail server written in Node.js. MongoDB-backed, scales horizontally, designed for hosted email providers and large self-hosted deployments.