diff --git a/libexec/rc/rc.conf b/libexec/rc/rc.conf
--- a/libexec/rc/rc.conf
+++ b/libexec/rc/rc.conf
@@ -597,6 +597,7 @@
 			# Script to start your chosen MTA, called by /etc/rc.
 # Settings for /etc/rc.sendmail and /etc/rc.d/sendmail:
 sendmail_enable="NO"	# Run the sendmail inbound daemon (YES/NO/NONE).
+			# If NONE, don't start any sendmail processes.
 sendmail_pidfile="/var/run/sendmail.pid"	# sendmail pid file
 sendmail_procname="/usr/sbin/sendmail"		# sendmail process name
 sendmail_flags="-L sm-mta -bd -q30m" # Flags to sendmail (as a server)