Correo is a new open-source mail client for Mac OS X. Correo blends technology from two popular Mozilla projects, Camino and Thunderbird, to create a polished native Mac application.
The second release of the Mozilla and cocoa hybrid contains many new features and upgrades from 0.1. This release is intended to give the community a preview of the native Mac OS X features that are being implemented. Included in this release are OS X features such as Keychain and Address Book support. Other new features include initial support for attachments, single-window mode, and auto-complete text fields.
There are many planned more...
RequirementsMac OS X 10.4 or later
*Previously available here