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.
Simple, modern & fast web-based email client
Be aware of new message in your mailbox
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
Allow to redirect (a.k.a. "remail") mail messages to other recipients
Add keyboard shortcuts to switch between different thread views
Free and open source webmail software