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-rw-r--r--doc/apps/s_client.pod7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/apps/s_client.pod b/doc/apps/s_client.pod
index 7fca9cbdbd..47dc93cb3f 100644
--- a/doc/apps/s_client.pod
+++ b/doc/apps/s_client.pod
@@ -33,6 +33,7 @@ B<openssl> B<s_client>
[B<-no_tls1>]
[B<-bugs>]
[B<-cipher cipherlist>]
+[B<-starttls protocol>]
[B<-engine id>]
[B<-rand file(s)>]
@@ -163,6 +164,12 @@ the server determines which cipher suite is used it should take the first
supported cipher in the list sent by the client. See the B<ciphers>
command for more information.
+=item B<-starttls protocol>
+
+send the protocol-specific message(s) to switch to TLS for communication.
+B<protocol> is a keyword for the intended protocol. Currently, the only
+supported keyword is "smtp".
+
=item B<-engine id>
specifying an engine (by it's unique B<id> string) will cause B<s_client>