mime-construct(1p) on Linux
The text 3fb08e6edf3d, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
construct and optionally mail MIME messages
Flags it lists
-
--attach -
--attachment -
--bcc -
--body -
--cc -
--debug -
--embedded-to -
--encoding -
--file -
--file-attach -
--file-auto -
--header -
--help -
--multipart -
--output -
--part-header -
--prelude -
--string -
--subject -
--subpart -
--subpart-file -
--subpart-string -
--to -
--type -
--version