Sup
The facts below are what the maker publishes about Sup, checked and dated. Our editors have not written about it yet.
Plans and prices
From Sup's own pricing page, checked 12 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Sup | Free | GPL-2.0 licensed email client |
The facts
Each one read from Sup's own pages, with the date it was checked.
What it does
- Accounts
- It supports multiple accounts and selects the corresponding SMTP server, signature, and sender address when replying.checked 12 Oct 2026
- Contacts and labels
- Sup tracks recent contacts and supports user-defined labels.checked 12 Oct 2026
- Customization
- Ruby hooks can add custom code to handle message types or text within messages.checked 12 Oct 2026
- Integrations
- The project wiki documents mail retrieval through OfflineIMAP, mbsync/isync, and Fetchmail, and sending through msmtp, putmail, and sendEmail.checked 12 Oct 2026
- Latest listed release
- The releases page lists sup-1.4.gem dated 21 April 2026.checked 5 Oct 2026
- License
- The repository says Sup is free software under the GNU General Public License, version 2 or later.checked 5 Oct 2026
- Limitation
- Sup may not work smoothly alongside other mail clients because not all changes can be synchronized back to the mail source.checked 12 Oct 2026
- Mail-client compatibility
- The repository README says Sup generally does not work smoothly with other mail clients and that not all changes sync back to the mail source.checked 5 Oct 2026
- Mail sources
- It handles mail from multiple mbox and Maildir sources.checked 12 Oct 2026
- Maintenance
- The maintainers describe Sup as mature and production-quality, focus on preserving its current feature set, and welcome bug-fix and compatibility pull requests.checked 12 Oct 2026
- Privacy
- The feature list states that Sup supports GPG.checked 12 Oct 2026
- Product
- Sup is a console-based email client for people with a lot of email.checked 12 Oct 2026
- Search
- It provides a local full-text index and searches message bodies using a query language.checked 12 Oct 2026
- Security
- The security guide cautions that attachment content-type and filename metadata are sender-controlled and should not be used uncritically in commands.checked 5 Oct 2026
- Support
- The project directs bug reports to its GitHub issue tracker and provides a mailing list for general discussion, development, and announcements.checked 12 Oct 2026
- Threaded email
- It displays hierarchical email threads that can have multiple tags.checked 12 Oct 2026
- Threads and tags
- It organizes messages into hierarchical threads that can have multiple tags.checked 5 Oct 2026
Where it runs
- App coverage
- desktopchecked 20 Sep 2026
- Platform support
- The wiki lists Debian/Ubuntu, Fedora, Arch Linux, macOS, FreeBSD, and OpenBSD installation guidance and says Windows is not supported.checked 12 Oct 2026
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