How can i recover mail from time machine

Question

i upgraded from lion to mountain lion few month ago. i have been backingup to time machine since day one.
last week, formatted my mac, i tried to recover my mail by using time machine, it did not show up any date for recovery. 
it there a way to import back these mail? or is there a way to recover it?

Answer 1

Although you can restore messages from a Time Machine snapshot within the Mail application, it generally won't work with messages that were saved by an older version of Mail. In that case, you have to use an alternative method.
Triple-click the line below to select it:
~/Library/Mail/V2
Right-click or control-click the highlighted line and select
Services ▹ Reveal
from the contextual menu.* A Finder window should open with a folder selected. Inside that folder are subfolders representing your Mail accounts. The names refer to the email addresses you use. Decide which ones you want to restore messages from.
Enter Time Machine and scroll back to the snapshot you want. Select the account folders you want and then select  Restore ... to... from the action menu (gear icon) in the toolbar of the snapshot window. Restore the folders to the Desktop, not to their original location.
From the Mail menu bar, select
File ▹ Import Mailboxes...
Import from the mailboxes in the folders you restored to the Desktop. The imported messages will appear in a new mailbox. Move the ones you want to keep wherever you like and delete the rest. Then delete the folders on the Desktop.
*If you don't see the contextual menu item, copy the selected text to the Clipboard (command-C). In the Finder, select
Go ▹ Go to Folder...
from the menu bar, paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.