In mail, after importing mailboxes the process gets stuck on '1619 of 72826' and 'time remaining' climbs infinitely. Please suggest a solution.

In 'mail', after importing mailboxes the process gets stuck on '1619 of 72826' and 'time remaining' climbs infinitely. Please suggest a solution.

I converted my mail boxes from POP to imap for the purpose of syncing all my devices. I backed up my mail boxes and further more perfomed a timemachine backup.

Upon restoring ther mailboxes, either by manually copying them to the mailboxes folder, and restoring a timemachine backup, both pocesses result in the above problem.

Please recomend a solution.

file://localhost/Users/redwood/Desktop/Screen%20Shot%202013-10-15%20at%201.48.10 %20PM.png

file://localhost/Users/redwood/Desktop/Screen%20Shot%202013-10-15%20at%201.38.30 %20PM.png