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E-Mail Client: Free Alternative to Thunderbird

  • Oct 30, 2025
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Thunderbird is a good, free E-Mail Client. Nevertheless, there are Alternatives that can be just as much or even more. We introduce you to three of them.

Windows Live Mail 2012: free Alternative to Thunderbird

Since Windows 7 and Windows 8 Mail Clients such as Windows Mail or Outlook Express are pre-installed, Microsoft has created an Alternative. Which is also free:
  • The functionality of Windows Live Mail and Thunderbird is about the same. You will miss after the switch has no function, but have access to other services of Microsoft.
  • The calendar function can not only be used offline and with any Mail Account, but can also be used with a Microsoft Account to sync. So you have to handle your calendar always on the Web.
  • In addition to the functions "E-Mail" and "calendar" are also the "contacts" and the "Feeds" and clearly separated from each other.
  • In the following practice tip you can find a guide to setting up Windows Live Mail 2012.
Windows Live Mail 2012

EssentialPIM: Versatile, free e-Mail Client

  • A very simple and feature-rich e-Mail program is EssentialPIM. It not only runs on almost all versions of Windows, but also has many useful Features.
  • In comparison to the Outlook of the program looks much tidier and is reduced to the main function. These include Mail, calendar, notes, contacts, and tasks.
  • On the right Smartphone App, you can synchronize your data between phone and Computer.
  • Conclusion: Essential PIM is a good, free Alternative to Thunderbird, which is to understand especially for beginners easy to.
Essential PIM for Windows

Claws Mail: the Open-Source Alternative to Thunderbird

  • In the case of Claws Mail is an E-Mail Client for Windows and Linux. The Software is designed to be especially slim, simple and as functional as possible. So Claws Mail even on small computers like the Raspberry Pi to use.
  • Claws Mail can pretty much everything the normal user needs. Compared to Thunderbird, the scope of the function, however, is a little lower. For example, you cannot write HTML-Mails, so the program is for a professional use of Claws Mail is always suitable.
  • More secure than Thunderbird, Claws Mail is not. With the extension of Gpg4win is from Claws Mail is a safe for your e-Mails. Your mail can be extremely secure encryption, so that only the right recipient can read with the matching key in your Mail. For this purpose, the receiver need not necessarily Claws Mail, but also the Tool Gpg4win.
Claws Mail for Linux and Windows

Pimero 2014: Alternative to Thunderbird

  • With the help of "Pimero 2014 Free Edition" is a program that primarily as an Organizer is used.
  • The service is designed to help you mainly in the Organisation of your appointments and tasks. As a further feature a fully-functional Mail, however, is a built-in Client.
Calendar Software: Pimero 2014

Opera Mail: All what your heart desires

  • In addition to the popular Browser Opera has also developed a Mail Client. With Opera Mail you can use your mail similar to Thunderbird to manage. Especially the Clarity convinced.
  • As well as in the Browser, you can open Opera Mail multiple Tabs. This allows you to edit various mail messages, or calendar and, above all, arranged.
Opera Mail tired of Thunderbird
In the next practical tip we will show you how to get your Mails properly encrypt.

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