check_smtp_send(7) on Linux
The text 1a99e44fe819, as Debian 12 (Bookworm) shipped it.
connects to an SMTP server and sends a message
Flags it lists
-
--auth -
--body -
--critical -
--expect-response -
--header -
--help -
--hires -
--hostname -
--mailfrom -
--mailto -
--nossl -
--notemplate -
--notls -
--password -
--port -
--ssl -
--stdin -
--template -
--timeout -
--tls -
--usage -
--username -
--verbose -
--version -
--warning