Do not have gray lines on a white background like in the header of Outlook email. Make the lines black.
Have bold black lines on a white background on the header of Outlook email. MS now has gray on white -- the lines are hard to see.
Thanks for sharing this feedback with us Jack, we have a few questions about your post. 1. Where in the Outlook interface are you running into the grey lines on the white background? 2. What version of Outlook are you on and have you tried updating?