Mozilla has released Thunderbird 11, the latest version of its email and news client for Mac, Windows, and Linux.
What's New In This Version: ● New user interface with Tabs above the main menu bar to facilitate navigation and make it more contextual ● Various security fixes ● Thunderbird notifications may not work properly with Growl 1.3 or later (691662) ● Fixes a crash seen during importing of Microsoft Outlook profiles (723105)
You can download Thunderbird from the link below...
I just installed this Email Client.
Pro's
Better view like Outlook.
You have a good control on the Email settings.
Activity Manager. In case you have moved or deleted mails but do not remember what you actually did, Activity Manager can help you.
Tabbed View
Cons'
Need to have unified inbox, if you are using multiple accounts.
Summary: This beats Sparrowmail. Awesome Email client.
Added to my previous Comment.
I had mentioned that the Unified Inbox is not available. I need to apologize, that this feature is available by clicking on View->Folders->Unified