qmail
The facts below are what the maker publishes about qmail, checked and dated. Our editors have not written about it yet.
Plans and prices
From qmail's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| qmail | Free | Latest published package listed: qmail-1.03.tar.gz |
The facts
Each one read from qmail's own pages, with the date it was checked.
What it does
- Compatibility
- qmail includes a sendmail-compatible wrapper and supports .forward and /etc/aliases through separately available tools.checked 9 Oct 2026
- Dependencies
- Some listed capabilities, including parallelism limits, RBL support, and mailing-list subscription management, use separately available tools or packages.checked 9 Oct 2026
- Designed for
- The maker describes qmail as designed for typical Internet-connected UNIX hosts.checked 9 Oct 2026
- Distribution terms
- The maker places the qmail package in the public domain and says it may be modified and redistributed.checked 9 Oct 2026
- Download
- The maker lists qmail-1.03.tar.gz as the latest published qmail package.checked 9 Oct 2026
- License
- The maker places the qmail package, specifically qmail-1.03.tar.gz, in the public domain and permits modification and redistribution.checked 9 Oct 2026
- Mailboxes
- qmail optionally supports Maildir, which the maker describes as resistant to corruption during delivery if the system crashes.checked 9 Oct 2026
- Mailbox format
- qmail optionally supports maildir, which the maker describes as resistant to corruption if a system crashes during delivery.checked 9 Oct 2026
- Mail delivery
- The maker says qmail queues messages and writes local deliveries to disk before reporting success.checked 9 Oct 2026
- Mail handling
- The maker lists virtual domains, relay control, host and user masquerading, and independent message retry schedules among qmail's capabilities.checked 9 Oct 2026
- Mailing lists
- qmail supports user-managed mailing lists, VERPs for bounce handling, and automatic loop prevention, including across hosts.checked 9 Oct 2026
- Protocols
- The package includes a POP3 service with UIDL and TOP support, and its 1.03 changes added QMQP client and server support.checked 9 Oct 2026
- Purpose
- qmail is a secure, reliable, efficient message transfer agent for typical Internet-connected UNIX hosts.checked 9 Oct 2026
- Related software
- The maker recommends djbdns for use with qmail and lists ezmlm, ucspi-tcp, serialmail, and other related packages.checked 9 Oct 2026
- Reliability
- The maker says qmail is designed so a message accepted into the system will not be lost.checked 9 Oct 2026
- Security design
- The maker lists separation between addresses, files, and programs; reduced setuid and root code; and five-way trust partitioning as security features.checked 9 Oct 2026
- Sendmail compatibility
- qmail includes a sendmail wrapper intended to let it be used transparently by existing user agents.checked 9 Oct 2026
- SMTP
- qmail-smtpd supports relay controls, 8-bit messages, and SMTP extensions listed on the maker’s feature page.checked 9 Oct 2026
- Support
- The FAQ includes troubleshooting and asks whether commercial support is available, but the opened FAQ index does not state a support offering.checked 9 Oct 2026
- Supported systems
- The maker lists AIX, BSD/OS, FreeBSD, HP/UX, Irix, Linux, OSF/1, SunOS, and Solaris, among other UNIX variants.checked 9 Oct 2026
Where it runs
- Windows limit
- The FAQ says qmail does not support Windows NT.checked 9 Oct 2026
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