mu-extract(1) on Linux
The text 794976eae973, as Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it.
display and save message parts (attachments), and open them with other tools.
Flags it lists
-
--overwrite -
--parts -
--save-all -
--save-attachments -
--target-dir -
-a