The humanity theme contains the icon (it is called mail-mark-notjunk). The problem is that the patch in debian/patches/89_express.patch renames the action to mail-mark-not-junk. This change had been done temporarily in the evolution codebase but was reverted afterwards: https://bugzilla.gnome.org/show_bug.cgi?id=616954
The humanity theme contains the icon (it is called mail-mark-notjunk). The problem is that the patch in debian/ patches/ 89_express. patch renames the action to mail-mark-not-junk. This change had been done temporarily in the evolution codebase but was reverted afterwards: https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 616954
This renaming should be removed from the patch.