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Postbox alternatives

  • Thunderbird

  • Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

    tags: Portable built-in-rss-reader calendar-integration customizable email-client
    platform: Mac OS X Windows Linux BSD Haiku
  • Inbox by Gmail

  • Built on everything that we've learned from Gmail, Inbox is a fresh start that goes beyond email to help you get back to what matters.

    tags: email-client email-management gmail-client google-calendar-sync todo-manager
    platform: Online Android iPhone Chrome OS iPad Google Chrome
  • Microsoft Office Outlook

  • Microsoft Outlook, part of the Microsoft Office Suite (not to be confused with Microsoft Outlook Express), is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

    tags: built-in-calendar calendar contacts dark-theme email-client
    platform: Mac OS X Windows Online Android iPhone Android Tablet Windows Phone iPad Apple Watch Android Wear
  • eM Client

  • eM Client is a full featured email client with a modern and easy to use interface. - offers calendar, tasks, contacts and even chat.- fully optimized to run smoothly on Windows XP, Vista, 7, 8 and 10.- supports all major services including Gmail, Exchange, iCloud, and easily imports your data from most of the other e-mail clients. This includes Microsoft Outlook, Outlook Express, Windows Mail, Windows Live Mail, Thunderbird, The Bat and more.- fully supports touch devices like touch-enabled laptops, tablets and hybrid devices. Use your email client easily in a modern way.- finds any email, contact or attachment in seconds with eM Client's super-fast search. »

    tags: address-book automatic-backup built-in-themes built-in-translation calendar
    platform: Windows
  • Evolution

  • Evolution is the official personal information manager and workgroup information management tool for GNOME. It combines e-mail, calendar, address book, and task list management functions.

    tags: address-book built-in-rss-reader caldav calendar calendar-integration
    platform: Linux BSD GNOME
  • Mailbird

  • Mailbird is a Windows based email client which design and style match Windows 7, 8 and XP’s native styles. Mailbird provides clean, simple and lightning fast email experience.

    tags: asana-integration contact-sync contacts conversation-view dropbox
    platform: Windows
  • Apple Mail

  • Apple Mail changes the way you interact with your email every day.

    tags: email-client gpg-addon mac-built-in
    platform: Mac OS X iPhone iPad
  • Geary

  • Geary is a lightweight email program designed around conversations and built for the GNOME desktop.

    tags: email-client gnome-integration
    platform: Linux BSD GNOME
  • Spark

  • Smart Inbox automatically detects if an email is personal, a notification or a newsletter and groups it with similar emails for easy batch processing using beloved swipes. With just a glance, you can see if emails are important or just a product announcement from a service you've never used.

    tags: calendar-integration email-client mailbox save-as-pdf
    platform: Mac OS X iPhone iPad Apple Watch
  • Claws Mail

  • Claws Mail is an email client (and news reader), based on GTK+, featuring

    tags: address-book built-in-rss-reader calendar content-filtering email-client
    platform: Windows Linux BSD Xfce
  • Airmail

  • Airmail is a lightweight and lightning fast mail client for Mac.

    tags: customizable dropbox-integration email-client export-to-eml fullscreen-support
    platform: Mac OS X iPhone iPad Apple Watch
  • EssentialPIM

  • EssentialPIM lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

    tags: Portable calendar contacts-management note-taking personal-information-manager
    platform: Windows Android iPhone
  • Mutt

  • Mutt is a small but very powerful text-based mail client for Unix operating systems. Some of its features are: color support, message threading, MIME support (including RFC2047 support for encoded headers), PGP/MIME (RFC2015), various features to support mailing lists, including list-reply, active development community, POP3 support, IMAP support.

    tags: command-line command-line-interface email-client imap imap-support
    platform: Mac OS X Windows Linux Xfce
  • Sylpheed

  • Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

    tags: email-client gtk lightweight mua non-html
    platform: Mac OS X Windows Linux BSD
  • Inky

  • Using your existing email accounts, Inky lets you exchange encrypted and digitally signed emails with anyone — your recipients don't need to install anything or remember a special password. Encryption provides confidentiality, and signing provides sender verification to help prevent phishing attacks.

    tags: anti-phishing connect-web-accounts email-client inbox-management security-and-privacy
    platform: Mac OS X Windows Android iPhone Android Tablet iPad