Maddy Mail Server
Single-binary Go mail server replacing Postfix, Dovecot, OpenDKIM, and OpenDMARC
Overview
Maddy is a composable, all-in-one mail server daemon written in Go that replaces the traditional multi-component stack (Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC) with a single binary. It implements SMTP (MTA and MX roles), IMAP, DKIM signing, SPF, and DMARC enforcement. Configuration is done via a single structured config file, and storage backends include local filesystem and optional external databases.
Where it falls short of Gmail / Google Workspace
- No webmail interface; users need a separate IMAP client
- Documentation is less comprehensive than established stacks like Postfix + Dovecot
- No built-in web admin panel for managing accounts
- Smaller ecosystem and community compared to traditional mail server components
We list the gaps honestly so you can decide if the trade-off is worth owning your data.
Tags
Claim this listing to keep it accurate, add a deploy template, or feature it on relevant pages.
Embed the Maddy Mail Server difficulty badge in your README — it links back here.
[](https://openreplace.com/maddy-mail-server)Similar open-source projects
Other self-hostable tools in the same space worth comparing.
High-performance self-hosted newsletter and mailing list manager
Production-ready, config-driven mail server in a single container
Self-hosted mail delivery platform, a SendGrid/Mailgun alternative
Turn any Ubuntu VPS into a complete, self-hosted mail server in one command