Mozilla Thunderbird is a free and open-source cross-platform email client developed by the Mozilla Foundation in December 2004. Since then, many new versions have been released.

The Thunderbird interface is user-friendly and supports IMAP, POP, and Exchange accounts as well. It is the default email client for many Linux Distros, for example, Ubuntu.

It provides loads of customization options and is one of the best email client alternatives to Microsoft Outlook.

Mozilla Thunderbird Features

  • Mail Account Setup Wizard
  • One-click Address Book
  • Attachment Reminder
  • Tabbed Email
  • Quick Filter Toolbar
  • Search Tools
  • Messages Archive
  • Smart Folders
  • Add-on Manager
  • Robust Privacy
  • Phishing Protection
  • Automated Update
  • Junk Email Filter

System Requirements

Windows Operating Systems (32-bit and 64-bit): Windows 7, Windows 8, and Windows 10

MAC Operating Systems ( macOS 10.12, macOS 10.13, macOS 10.14, macOS 10.15, and macOS 11)

Linux Operating Systems (GTK+ 3.14 or higher, X.Org 1.0 or higher (1.7 or higher is recommended), libstdc++ 4.8.1 or higher glibc 2.17 or higher)

There are several additional requirements. Refer to the link below.


Visit the below link to download Mozilla Thunderbird.


After downloading the software, run the setup file and follow the installation instructions to install the software.

How to configure IMAP Account for Outlook.com in Mozilla Thunderbird

1. Open the Thunderbird email client. It will ask you to set up your email account. Enter your name, email address, and password, then click on Continue.

How To Setup Outlook.com IMAP in Thunderbird

2. Under protocol, select “IMAP“. You will see incoming and outgoing IMAP settings. Click Done..

How To Setup Outlook.com IMAP in Thunderbird

The IMAP account for Outlook.com has been configured.

How To Setup Outlook.com IMAP in Thunderbird

Follow our post below on how to configure how to set up a Gmail account in Microsoft Outlook.



Mozilla Thunderbird is a free and open-source email client developed by the Mozilla Foundation. Follow the steps mentioned in this post to configure your Outlook.com IMAP account in Thunderbird.

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By Feroz Khan

Feroz Khan works as a system administrator with more than 12 years of experience in information technology. He would like to share the knowledge with others that he has gained during his working experience.

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