Increasing fon size

How do I go about increasing the font size of the Mail portion of the frame on the left of the eMClient window.  The fonts of Mail, Contacts,Calendar and Tasks are fine but the fonts for each email account and their folder names is way to small and I want to increase them.

How do I do this?

Thank you.

Hi, unfortunately this can not be resized using the current settings.
Maybe in future releases.

Hope you can manage to use the current settings,