you can can find your saved column layouts in…
hang on, you are saving your column layouts, aren’t you?
if not, the right click on the head of any column other than the main “name” column,
and chose “save column layout”
by default these will be saved in your Home Folder > Library > Preferences >Final Cut Pro User Data,
along with any saved window and keyboard layouts
so after saving, just navigate there and there they will be ready for e-mailing.
in later versions of OSX the only way to get to your library folder is to use the Go Menu in the finder,
AND you have to hold option down while you are there to make the Library folder visible.
as a safely precaution against any possible corruption that might happen whilst in transit, i would compress or archive them before e-mailing.
cheers,
nick