Self-hosted
maddy
Composable all-in-one mail server.
overview
maddy is a self-hosted mail server that implements SMTP for outbound and MX receipt, IMAP storage, DKIM, SPF, DMARC, DANE, and MTA-STS. It replaces the classic Postfix plus Dovecot plus OpenDKIM style stack with one daemon and one configuration model.
deliverability
Self-hosted deliverability depends on DNS, IP reputation, queue management, bounce handling, and ongoing abuse controls. maddy includes DKIM, SPF, DMARC, DANE, and MTA-STS building blocks.
best for
Infrastructure teams that want a compact self-hosted mail server with modern authentication primitives.
not great for
Product teams that need managed deliverability and support.
pros
- › Single daemon replaces several traditional mail-server components
- › Implements SMTP, MX receipt, IMAP, DKIM, SPF, DMARC, DANE, and MTA-STS
- › GPL-3.0 licensed and actively documented
cons
- › Self-hosted email remains operationally demanding
- › IMAP storage is documented as beta on the project site
- › No hosted SaaS plan or support pricing was found on the official site
Features at a glance
| API | No |
| SMTP | Yes |
| SDKs | None |
| Webhooks | No |
| Templates | none |
| React Email | No |
| Batch send | No |
| Scheduled send | No |
| Suppressions | No |
| Multi-tenant | Yes |
| Inbound parsing | Yes |
| Event stream | No |
| Idempotency keys | No |
| Dedicated IP | No |