I have used Gnome for such a long time that all my emails are stored in the .evolution configuration folder. With a default Kubuntu installation Evolution is obviously not installed because it is a Gnome application. This is not a problem, as you can do a single apt-get command to install Evolution and all associated Gnome dependencies. The Ubuntu repositories are set up extremely well, and most of the time all dependencies will resolve perfectly.
sudo apt-get install evolution 
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If you use Evolution main from an installation that was originally in the /home/user/.evolution folder, and have migrated to a separate partition with a different mount point, you will have to create a link to the folder in the home/user directory. For instance my .evolution folder is stored on my extra partition in /media/sda5/.evolution, and when I try and send mail it tries to save the data in /home/user/.bgevolution. To correct this error I simply placed a link to /media/sda5/.bgevolution inside the /home/user/ folder. This resolves everything and establishes folder location consistency for Evolution Mail.
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