Reverse DNS does not match SMTP Banner

emailwiz.sh

@@ -286,7 +286,7 @@ sed -i '/^SOCKET/d' /etc/default/opendkim && echo "SOCKET=\"inet:12301@localhost
 echo 'Configuring Postfix with OpenDKIM settings...'
 postconf -e 'smtpd_sasl_security_options = noanonymous, noplaintext'
 postconf -e 'smtpd_sasl_tls_security_options = noanonymous'
-postconf -e "myhostname = $domain"
+postconf -e "myhostname = $maildomain"
 postconf -e 'milter_default_action = accept'
 postconf -e 'milter_protocol = 6'
 postconf -e 'smtpd_milters = inet:localhost:12301'