Alternative apps to Postbox:
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Mailbird is an email client for Windows, that provides all the right features and tools to help you reach inbox zero faster.
- Freeware
- Windows
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Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features.
- Freeware
- Windows, macOS, Linux
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Web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing made simple.
- Freeware
- Windows, macOS, Linux
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Opera Mail is a lightweight, customizable mail client. Reading, labeling, and filtering messages has never been so easy.
- Freeware
- Windows, macOS
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Internet Mail is the software specifically designed for the Internet e-mail.
- Free to Try
- Windows
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Manage multiple email accounts, calendars, and your contacts, even when you're offline.
- Freeware
- Windows