Need to Switch from Mac Thunderbird to Apple Mail. But First I want to backup Mac Thunderbird. How Can I Do It? I recently switched to a new company. As I am the sales head, I receive a lot of emails to look at daily. Earlier I was using Mac Thunderbird as my daily email client but now here it is mandatory to use Apple Mail. So I need to switch from Mac Thunderbird to Apple Mail. The only thing that I require is to backup all my emails before I make the switch so that I don't loose any while migration. I am looking for a quick backup solution that won't take long to do the backup procedure. 

Thanks for the help in advance.
Have you tried Time Machine to Backup your emails?

A more elaborate procedure is explained here: https://www.youtube.com/watch?v=Cd2YaBCXpaM

You can also opt for third party applications: http://mac.softpedia.com/get/Utilities/Mail-Backup-X.shtml

I hope this helps. Thanks