Browse free open source Email Clients and projects for Windows below. Use the toggles on the left to filter open source Email Clients by OS, license, language, programming language, and project status.
Windows eml and mbox viewer.
A faster, leaner email client and fork of Nylas Mail
Email Notifier For Windows
Open source email service with a strong focus on security and privacy
The cult-favourite eMail client formerly known as Qualcomm Eudora
Lightweight Open Source webmail written in PHP and JavaScript
Create, send and track Unlimited bulk emails for Free
Mail Notifer for Windows
One Click Solution to Convert Outlook Files to Retrieve Data Again
SaltOS, ERP, CRM, Business Management Suite, Josep Sanz Campderrós
Simple, modern & fast web-based email client