Add option to remove new grid lines
The latest update to the Outlook client (15.32) on mac adds horizontal grid lines to the message list (preview pane turned off), but added no discernible option to turn them off. The visual clutter really slows me down and I'm surprised MS would make such a significant, draconian (and completely arbitrary) change to the interface without giving users the option to revert it. Was this even user-tested on customers who had Outlook already configured without the grid lines? Please surface an option to turn them off ASAP.
Matt Wagner commented
Issue persists in Outlook client v15.33