I manage a few shared mailboxes, so I’ll often get an email meant for “hlt” to the “hit” box. The scary thing is that all of these emails contain identifying personal information for clients and these people aren’t even making sure they have the correct email address before hitting send.

I get so many emails sent to me incorrectly because of that.

Second this - if you google anti-collision stickers this should do the trick. Alternatively you could also use some scotch tape (non-transparent) and tape a line across the outside of the window every 3-4 inches for a DIY fix.