Maddy Mail Server review
A free, security-focused mail server for compact Linux deployments.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Maddy Mail Server is free, open-source email server software for individuals and small deployments that want to run mail infrastructure on Linux. It handles SMTP mail transfer and message submission, accepts inbound SMTP mail, stores messages, and provides IMAP mailbox access. Its security coverage includes DKIM signing and verification, SPF checks, DMARC processing, and delivery protections through DANE and MTA-STS. Multiple domains, virtual users, routing, filtering checks, and configurable delivery targets support compact self-hosted environments.
Deployment is aimed at administrators comfortable with configuration files and command-line utilities rather than a built-in administration interface. Maddy provides Linux packages and Docker deployment options, and its self-hosted model keeps the server within an operator-managed environment. Rspamd is the named external integration for content filtering, while the core product focuses on mail transport, mailbox access, message storage, and policy controls. This makes Maddy a focused foundation for a mail stack rather than a complete end-user collaboration suite.
The main trade-off is breadth. Maddy has no built-in webmail or content filter, and its IMAP storage is described as beta. POP3 and mobile sync are not part of the available feature set, so teams looking for broad client access or a browser-based mailbox experience should choose a product with those interfaces included. Maddy fits administrators who value open-source control, protocol coverage, and layered email-authentication features in a compact deployment. It is less suitable for organizations seeking an integrated webmail experience, built-in antispam, or a broader groupware platform.
Maddy Mail Server pros and cons
- Where it wins
- Combines SMTP, inbound mail, IMAP storage, routing, and delivery targets
- Covers DKIM, SPF, DMARC, DANE, and MTA-STS security functions
- Open-source GPL-3.0 software with Linux and self-hosted deployment options
- Where it doesn't
- No built-in webmail interface
- Content filtering is not built in; Rspamd can be integrated
- IMAP storage is beta, with no POP3 or mobile-sync support
Maddy Mail Server fact sheet, pricing and score →
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