If saving important emails, then you should be thinking about an email backup option, just in case something should happen in the future. Don't rely on anyone to assure that your emails are being backed up properly. Because in the end your the one who's going to loose this valuable information.
There are several ways to backup your emails and here are a few.
Links
Mail Store
Amic Tools
There are several ways to backup your emails and here are a few.
Links
Mail Store
Amic Tools