couriertls(1) on Linux
The text c6a8e9b3a092, as Debian 8 (Jessie) shipped it.
the Courier mail server TLS/SSL protocol wrapper
Flags it lists
-
-host -
-localfd -
-port -
-printx509 -
-protocol -
-remotefd -
-server -
-statusfd -
-tcpd -
-verify