Urgent to all residents of the building - Spam Warning !!
This email is interesting as it appears to be aimed at smaller companies sharing a large office building where staff may not know the name of the fire-safety officer or building administrator.
The email itself, however, is very simple and has no signature to impress authority on anyone:
From: Frances Moyer <firstname.lastname@example.org>
Sent: 11 December 2018 13:43
Subject: Urgent to all residents of the building
Please find below the Up to date emergency exit map.