Alternative apps to Postbox:
  • 4.8
    67 votes
    Mailbird is an email client for Windows, that provides all the right features and tools to help you reach inbox zero faster.
    • Freeware
    • Windows
  • 2.9
    92 votes
    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
  • 3.8
    26 votes
    Web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing made simple.
    • Freeware
    • Windows, macOS, Linux
  • 4.5
    64 votes
    Opera Mail is a lightweight, customizable mail client. Reading, labeling, and filtering messages has never been so easy.
    • Freeware
    • Windows, macOS
  • 5
    8 votes
    Internet Mail is the software specifically designed for the Internet e-mail.
    • Free to Try
    • Windows
  • 4.6
    7 votes
    Manage multiple email accounts, calendars, and your contacts, even when you're offline.
    • Freeware
    • Windows
  • 4.7
    10 votes
    All your email in one place.
    • Demo
    • Windows, macOS