As we’ve said before, proprietary software is pricey. Following our list of free and cheap office suites, we now turn to email clients that don’t cost a penny.
1) Mozilla Thunderbird
Credit: Mozilla
Platforms: Windows, OS X and Linux
- Tabbed windows
- Integration with messaging clients
- Junk mail filter
- Address book
- Supports privacy through Do Not Track
- Protects against phishing
- Add-on library
2) SeaMonkey
Credit: SeaMonkey
Platforms: Windows, OS X and Linux
- Integrated mail client, web browser and HTML editor
- Tabbed windows
- Sync across devices
- Session restoration
- Themes
- Open-source
- Junk mail filter
- Multiple accounts
3) Citadel
Credit: Citadel
Platforms: Linux and Unix
- Open-source
- Group calendar
- Instant messaging
- Content management with wikis and blogs
- Multiple domain support
- RSS aggregation
4) Columba
Credit: Soren121
Platforms: Windows, OS X and Linux
- Automated address collection and completion
- Mailboxes imports
- Calendars
- Email filtering
- Junk mail filter
- Themes
- Multiple languages
5) Evolution
Credit: AlexanderVanLoon
Platforms: Linux
- Junk mail filter
- Open-source
- Email filtering
- Encryption
- RSS aggregation
- Local and external address books
- Device synchronisation
- Integration with LibreOffice
6) Roundcube
Credit: Roundcube
Platforms: Windows, OS X or Linux
- Address book with groups
- Search function
- Drag-and-drop mail management
- More than 70 languages supported
- Unlimited users and messages
- Themes
- Canned responses
- Open-source
