Mainly
Self-hosted, open-source webmail client that unifies inboxes across multiple email addresses and domains in one fast interface.
🔗 Visit Mainly
Description
People who run their own domains, or several small projects each with their own email address, often end up juggling multiple webmail logins or a heavyweight desktop client just to check everything in one place. Mainly is a self-hosted webmail client built specifically around that situation: one interface, multiple domains and mailboxes, unified into a single inbox list.
Mainly is open source and deploys via Docker with a Postgres backend, so it runs entirely on infrastructure you control rather than a third-party inbox provider. It's built for speed and pulls mail from multiple mailboxes across different domains into one unified list rather than requiring you to switch accounts or tabs, and it's designed to be highly configurable for people who want to tune how their mail is organized. Being self-hosted, there's no subscription fee and no third party reading your mail metadata — the trade-off is that you're responsible for running and securing the deployment yourself.
💬 Our review
The short version: Mainly's core promise — one fast, unified inbox across multiple domains, fully self-hosted — fills a real gap for developers running several domains who don't want to either pay for multiple hosted mailboxes or juggle separate webmail tabs.
Most self-hosted mail solutions (Roundcube, for instance) are older, feature-heavy webmail clients originally built for a single mailbox and retrofitted for more; Mainly's pitch is being built from the ground up around the multi-domain, unified-inbox use case, with a modern Docker/Postgres deployment story that's easier to stand up than legacy webmail stacks. Being self-hosted means full control and no recurring cost, but it also means you own uptime, security patching, and backups — mail is not a service most people want to accidentally break. As a newer, smaller project, expect fewer polish details and a smaller plugin/extension ecosystem than Roundcube has accumulated over years. Worth it for developers who already self-host other services and want mail consolidated the same way; less appealing if you'd rather not operate mail infrastructure at all.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit, auto-hébergé (Docker/Postgres)
Pros
Boîte de réception unifiée multi-domaines dans une seule interface
Gratuit et open source, aucun abonnement
Déploiement moderne Docker/Postgres
Conçu nativement pour le multi-comptes, pas un ajout tardif
Cons
Auto-hébergement = responsabilité sécurité/uptime à votre charge
Projet jeune, écosystème de plugins limité vs Roundcube
Moins de recul en production que les solutions établies