masqmail(8) on Linux
The text d4b1188eac0c, as Debian 2.2 (Potato) shipped it.
Mail Transfer Agent
Flags it lists
-
-- -
-B -
-C -
-bd -
-bi -
-bp -
-bs -
-d -
-i -
-odb -
-odq -
-oem -
-oi -
-q -
-qo -
-t