checksendmail(8) on Linux
The text 99fcc18445da, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
verify sendmail address transformations.
Flags it lists
-
-C -
-T -
-a -
-b -
-d -
-l -
-r