DragonFly Mail Agent (dma)
Lightweight Mail Transfer Agent for local delivery and relay
DragonFly Mail Agent (dma) is a small Mail Transfer Agent (MTA) designed for home and office use. It accepts mail from locally installed Mail User Agents and delivers messages either to local mailboxes or to remote SMTP destinations. Remote delivery includes TLS/SSL support and SMTP authentication.
Key Features
- Lightweight, C-based MTA focused on local submission and outbound delivery
- Local delivery to system mailboxes and forwarding to remote SMTP servers
- TLS/SSL support and SMTP authentication for secure remote delivery
- Does not listen on port 25; intended as a simple MTA rather than a full internet-facing server
- Simple installation and configuration with sendmail-compatible links and basic mail queue tools
Use Cases
- Provide an outbound relay for desktops, servers, or a home network
- Deliver system and application notifications to local mailboxes
- Offer a minimal MTA for small offices or embedded systems where full-featured MTAs are unnecessary
Limitations and Considerations
- Not intended to replace full-featured MTAs; lacks many advanced features such as inbound SMTP on port 25, extensive routing/virtual hosting, and advanced filtering
- Limited scalability for high-volume or enterprise mail infrastructures
DragonFly Mail Agent is a pragmatic, minimal MTA for environments that need simple local delivery and secure remote relay. It is best suited where low resource usage and straightforward configuration are priorities.
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Tech Stack:
GNU Make
C
Linux
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