smtp-source(1) on Linux
The text c1777c181f91, as Debian 3.1 (Sarge) shipped it.
multi-threaded SMTP/LMTP test generator
Flags it lists
-
-C -
-L -
-R -
-S -
-c -
-d -
-f -
-l -
-m -
-o -
-r -
-s -
-t -
-w