Correo is a mail client that blends technology
from two popular Mozilla projects, Camino and
Thunderbird, to create a polished native Macintosh
application.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release introduces many internal fixes: Leopard support, enhanced IMAP support, and improved character encoding support. Sub-folders now load properly.
Passwords are now stored in the Mac OS X Keychain.
Mac OS X Address Book integration was implemented.
Single window mode was added, in which messages
are opened in a separate window. Attachments are
supported, so attachments may be saved and added
to messages. Message list support for IMAP
accounts was enhanced. Message headers and
attachment view are collapsible.