diff --git a/config/petidomo.conf b/config/petidomo.conf
index 45ad306..813e12b 100644
--- a/config/petidomo.conf
+++ b/config/petidomo.conf
@@ -9,7 +9,7 @@
 #	should use. This will usually be the 'real' name of the machine the
 #	software is running on, for example:
 #
-#	HostName listserver.foo.bar
+#	Hostname listserver.foo.bar
 #
 #	The name of the machine and the used name need not necessarily be
 #	the same, though. Please consult the manual for further details
@@ -38,8 +38,8 @@ AdminPassword	@ADMINPASSWORD@
 #
 #	MTA "/usr/sbin/sendmail"
 #
-#	The default, if the option is unset, is to use the Firepower SMTP
-#	client, which is part of the package.
+#	This option is REQUIRED. Petidomo will abort with an error, if it is
+#	unset.
 MTA	@MTA@
 
 #  TAG: MTA_Options <string>