bsmtp(1) on Linux
The text 01dc1473462d, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
Bacula's SMTP client (mail submission program)
Flags it lists
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-8 -
-? -
-c -
-d -
-dt -
-f -
-h -
-l -
-r -
-s