MailViewer is a GNOME application that allows users to read and decode .eml and .msg files (email files) without having to install any additional software or create an account.
It provides a graphical interface for easy navigation and rendering of email content, including attachments, HTML, and plain text.
Screenshots
Observed history
| App | Change | Version | When ↓ |
|---|---|---|---|
| updated | 1.0.17 | 14 Oct 2026 |
Upstream releases
Release notes supplied by the developer. These dates are not Flathub package publication times.
1.0.1714 Oct 2026
- Show full message headers (menu)
- Use full name for msg attachments
1.0.1510 Sept 2026
- Show how big an attachment is in its row
- Say when a message is signed or encrypted
- Keep the zoom buttons in step with the saved zoom
- Encode an inline image only when an image uses it
- Search in message (HTML only)
1.0.1419 Aug 2026
- Search within HTML emails with Ctrl+F (by shakaran)
- Light and dark for HTML messages (if Force CSS is enabled) (by shakaran)
- Setting for Force CSS
- Updated translations
1.0.1318 Aug 2026
- Fix printing to file and PDF
- Disable zoom buttons at the minimum and maximum zoom levels
- Improve HTML email sanitization and security (shakaran)
- Block unwanted remote content in emails (shakaran)
- Improve HTML escaping for filenames and message metadata
- Fix non-UTF-8 filenames and markup in attachment rows (shakaran)
- Improve temporary file cleanup (shakaran)