I remember these emails while in the Defense Industry. Sprinkled through the email would be choice words in all caps, and bolded, and in Italics, likely in red, maybe highlighted in some other color as well.

Such attempts at "letting others know you're serious about security" seemed more for CYA oversight purposes for the company's security department, but at least 100s of people got reeducated-by-email about proper door security during or after a fire drill.