mailer(8) on Linux
The text 1726fee02667, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 3.1 (Sarge) shipped it. The page shows this text now.
script to warn users about their weak passwords