Courier MTA
Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services.
Developed outside the platforms our data source measures, so there is no activity history to score. This says nothing about the project — many unrated projects are actively maintained.
Activity data
Not available for this project. Our source collects commit history from GitHub only, and Courier MTA is developed elsewhere.
| Stars | not measured |
|---|---|
| Latest release | — |
| Repo updated | — |
| Licence | GPL-3.0 |
| Built with | C, deb |
Is Courier MTA actively maintained?
We cannot measure this one. Courier MTA is developed outside the platforms our data source collects activity from, and its repository lives at www.courier-mta.org — so there is no commit history or release cadence here to score.
Read that as missing data, not as a warning. Several of the best-maintained projects in this catalogue are unrated for exactly this reason. To judge it, open the repository and look at the date of the most recent commit yourself.
What Courier MTA actually does
Courier MTA is a mail transfer agent and groupware server that handles core messaging protocols like ESMTP, IMAP, and POP3. It also provides ancillary services including webmail, mailing lists, and basic web-based calendaring.
Best fit: Self-hosters who need a traditional, all-in-one mail server stack written in C for Linux environments.
Worth knowing: Setting up and maintaining a complete mail transfer agent involves significant operational complexity, particularly around DNS records and spam prevention. There is also potential overlap with much more widely adopted email stacks.
Deployment notes
As native Debian packages are used, you will typically need persistent storage for mail spools and configuration files. You will also want to handle TLS termination appropriately via a reverse proxy or direct certificate configuration.
Links
Courier MTA as a replacement for
Alternatives to Courier MTA
Projects in the same categories, ordered by health score.
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A small MTA for home and office use. Works on Linux and FreeBSD.
SMTP (email) server with a focus on simplicity, security, and ease of operation.
A small and easy to configure SMTP and POP3 server for Windows and Linux.
Message transfer agent (MTA) developed at the University of Cambridge.