Isn't it time that gnome-core stops depending directly on Evolution?
Perhaps gnome-core could depend on something like 'mail-reader' instead - so I could have gnome-core installed with, say, Icedove, and remove Evolution?
Oh, I see that 'mail-reader' is also provided by various non-GUI programs, so that may not be the perfect fit for Gnome.
Maybe the GUI mail readers could provide 'gui-mail-reader', or something? ⊗