Meet the New Mail
Mail gets a some great new features in Lion, including the favorites bar, expanded message snippets, and messages grouped by conversation. The favorites bar looks like Safari's bookmarks bar and shows whatever folders you choose, along with the unread count for those folders. On the left, each message shows the name of the sender, subject line, date, and a two line preview of the message. The Conversations feature shows an e-mail thread as a full feed, suppressing any duplicate quoted text.