Thunderbird/Lightning Add-On to support MS Exchange Calendar etc.

Persistent sticky notes for Thunderbird

mail/news reader supporting IMAP for emacsen

mail/news reader supporting IMAP for emacsen (development version)

monitor mailboxes and/or newsgroups

Transition Package, xcite to elpa-xcite

Displays an image for each piece of mail in your mailbox

mail notification pop-up with configurable message scans

Yet Another Mail Processing Language