rsmtp(8) on Linux
The text 0af7820b3d5e, as Debian 8 (Jessie) shipped it.
a Mail Transfer Agent
Flags it lists
-
-- -
--help -
--version -
-Ac -
-C -
-E -
-F -
-G -
-L -
-MCA -
-MCP -
-MCS -
-MCT -
-N -
-O -
-Tqt -
-U -
-X -
-bF -
-bP -
-bS -
-bV -
-bd -
-bdf -
-be -
-bem -
-bf -
-bfd -
-bfp -
-bfs -
-bi -
-bm -
-bmalware -
-bnq -
-bp -
-bpa -
-bpc -
-bpr -
-bpra -
-bpru -
-bpu -
-brt -
-brw -
-bs -
-bt -
-bv -
-bvs -
-bw -
-dropcr -
-e -
-f -
-h -
-i -
-m -
-n -
-oB -
-oMaa -
-oMai -
-oMas -
-oP -
-odb -
-odf -
-odi -
-odq -
-odqs -
-oee -
-oem -
-oep -
-oeq -
-oew -
-oi -
-oitrue -
-om -
-oo -
-or -
-os -
-ov -
-pd -
-ps -
-q -
-qq... -
-r -
-t -
-ti -
-tls-on-connect -
-v -
-x