Leopard Mail supports AOL, Yahoo! Mail and Gmail. And many features added, including RSS.
You will be really often to use Spotlight inside your Mail. Spotlight can spot messages, to-dos, notes, or even RSS feeds inside your Mail. And I love the new smarter Spotlight ranking system. Let's see how Spotlight search the keyword Leopard for certain RSS. You can compare with Spotlight search result with the very same keyword for entire Mail.
To add RSS you can go under File → Add RSS Feeds or click the Plus (+) button add the left bottom corner of your Mail Pane.
And Leopard will ask you to either browse feeds from your Safari bookmarks or directly fill in the feed URL.
Arrow ↑ and ↓ are useful for navigating inside the Feeds. To delete one or some of the feeds, keystrokes Command-Backspace could be used. You also can pass your RSS to your message inbox by clicking on the Up Arrow button.
Click the to-do toolbar and new to-do list is ready. Type in related name for your new to-do list. After that, you can do further editing on your to-do list. Control-Click on one of your to-do lists and choose Edit To Do. And now you can edit your to-do particular and even you can set alarm for your to-do.
Leopard Mail provides you with really powerful notes. You can attach images and files to your notes. For social purpose, you can forward your notes to your friends.
Leopard also provides some templates. When you composed new message, you can click on the Stationary button that appear at the right top corner of the new message pane and then you can choose your favorite one. And for addition, you can drag and drop your photo into photo frame (some templates don't have photo frame).
Like the old Tiger, Leopard can also customize the toolbar and this time, Leopard comes with more toolbars for you to choose, such as Note and To Do.
And not to forget about Smart Mailbox in which we can filter out our incoming mail according to our preferences, such as only store mail from high priority contacts.
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