
You can also check out lists of best free Open Source XMPP Client, Open Source Calendar Software, and Open Source Code Editor software for Windows. It also offers some handy additional tools like Chat, Offline Mode, Add-Ons, etc. Mozilla Thunderbird is my favorite email client because it is feature-rich and still quite easy to use. My Favorite Open Source Email Client Software For Windows: Go through the list to know more about these open source email clients. These email clients also come with some useful additional features such as Password Manager, Browser, Offline Mode, etc. Besides core emailing features, you also get Calendar (to create and view appointments, tasks, etc.), Address Book (to create and manage contacts of multiple users), View (to adjust the looks of these clients according to your needs), and more features in some software. Plus, advanced search and filter features to quickly locate desired emails are also present in these software. In these open source email clients, you can find all the essential email features like compose emails, reply to emails, forward emails, inbox, outbox, sent emails, trash emails, etc.

In some of these email clients, you can also include different email services along with messaging services with ease. Plus, email clients store all your emails and messages locally, thus you can even use these clients in the absence of an active internet connection, However, you still need an active internet connection to get new fresh emails. The good thing about an email client is that you don’t need to log in every time to access your emails, unlike web email services. In most of these clients, you can even add multiple email accounts and access emails of all accounts from one software.


Using these email clients, you can quickly access and manage your emails on a particular email account. These desktop open source email clients are completely free and you can even download, access, and make changes to their source code without any restriction. Here is a list of best free open source email client software for Windows.
