smtpping(1) on Linux
The text 4c811da3ad07, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it. The page shows this text now.
SMTP benchmarking and measurement tool
Flags it lists
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-4 -
-6 -
-C -
-H -
-P -
-S -
-c -
-d -
-f -
-p -
-q -
-r -
-s -
-w