diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt
index 481b3f50e3d690f5cd47ffa2c2d8bb645114e315..ec0e20182b2fc74ff4be9773426d39539c2d0aec 100644
--- a/Documentation/git-send-email.txt
+++ b/Documentation/git-send-email.txt
@@ -66,8 +66,11 @@ The options available are:
 	all that is output.
 
 --smtp-server::
-	If set, specifies the outgoing SMTP server to use.  Defaults to
-	localhost.
+	If set, specifies the outgoing SMTP server to use.  A full
+	pathname of a sendmail-like program can be specified instead;
+	the program must support the `-i` option.  Defaults to
+	`/usr/sbin/sendmail` or `/usr/lib/sendmail` if such program is
+	available, or to `localhost` otherwise.
 
 --subject::
    	Specify the initial subject of the email thread.