Sylpheed
The facts below are what the maker publishes about Sylpheed, checked and dated. Our editors have not written about it yet.
Plans and prices
From Sylpheed's own pricing page, checked 12 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Sylpheed | Free | GNU GPL software; no price stated |
The facts
Each one read from Sylpheed's own pages, with the date it was checked.
Where it runs
- App coverage
- desktopchecked 21 Sep 2026
What it does
- Attachment encryption plugin
- An optional plugin automatically packages outgoing attachments as encrypted ZIP files and creates a password notification email; it requires Sylpheed 3.5.1 or later and 7-Zip.checked 12 Oct 2026
- Email security
- It optionally supports GnuPG message signing and encryption, and SSL/TLSv1 connections for POP3, IMAP4, and NNTP.checked 12 Oct 2026
- Filtering and search
- Filters can match headers, message body, size, date, and flag status, and search results can be saved as search folders.checked 12 Oct 2026
- Integrations
- Sylpheed can call external commands for filtering and message composition, and can work with fetchmail or procmail for receiving mail.checked 12 Oct 2026
- Junk mail
- Junk mail control uses external commands, including bogofilter and bsfilter, and can use other programs as well.checked 12 Oct 2026
- Languages
- The maker says Sylpheed is translated into 30 languages and includes internationalized line wrapping in its editor.checked 12 Oct 2026
- License
- The maker describes Sylpheed as free software distributed under the GNU GPL, with its library part under the GNU LGPL.checked 12 Oct 2026
- Mail protocols
- It supports POP3, IMAP4rev1, SMTP, and NNTP, as well as IPv6.checked 12 Oct 2026
- Offline access
- Yeschecked 21 Sep 2026
- Product
- Sylpheed is a lightweight, user-friendly email client designed for beginners through power users.checked 12 Oct 2026
- Release status
- The site lists version 3.7 as stable, updated 31 January 2018, and version 3.8beta1 as the development version, updated 14 September 2022.checked 12 Oct 2026
- Storage
- Messages use MH format, with one file per message, which the maker says helps with backup, migration, and processing by other applications.checked 12 Oct 2026
- Support
- The Sylpheed mailing list was discontinued in 2025, and the maker points users to GitHub Issues for information sharing and bug reports.checked 12 Oct 2026
- Supported systems
- The maker lists Windows, Linux, BSD, Mac OS X, and other Unix-like systems; its requirements page specifies Windows 7/8.1/10 or Linux or another POSIX-compliant Unix-like OS.checked 12 Oct 2026
Money
- Free plan
- Yeschecked 21 Sep 2026
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