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BusinessAlternative to SendGridAlternative to PostfixAlternative to Exim

maddy

Composable, all-in-one email server written in Go with SMTP, IMAP, DKIM, and SPF built-in.

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LicenseGPL-3.0
GitHub stars5.5k
Last commit1 weeks ago
Tags5 topics
DevopsAll In One Mail ServerGolang Smtp ServerMaddy EmailImap Mail Storage
Overview

Why consider maddy?

maddy is an open-source, all-in-one email server written in Go by Max Mazurov (foxcpp). maddy replaces complex multi-service email stacks (Postfix + Dovecot + OpenDKIM) with a single binary handling SMTP delivery, IMAP storage, automated TLS certs, and DKIM/SPF/DMARC validation.

Guided learning

Learn maddy by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of maddy

maddy runs a complete corporate mail transfer agent (MTA) and IMAP mailbox server in a single binary.

Docker Quickstart

bash
1docker run -d -p 25:25 -p 143:143 -p 587:587 -p 993:993 foxcpp/maddy:latest

maddy is licensed under the GNU General Public License v3.0 (GPL-3.0).

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maddy FAQs

maddy is listed as a Business tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

maddy is listed under the GPL-3.0 license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

maddy is listed as an alternative to SendGrid. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.