milter-greylist(8) on Linux
The text d986b4568176, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
grey listing filter for sendmail
Flags it lists
-
-A -
-D -
-L -
-M -
-P -
-S -
-T -
-a -
-c -
-d -
-f -
-h -
-l -
-p -
-q -
-r -
-u -
-v -
-w