Added smtpd_relay_restrictions in postfix configuration (refs #25895).

2.Common_services/1.Postfix/main.cf

@@ -10,9 +10,10 @@ append_dot_mydomain = no
 #delay_warning_time = 4h
 
 # TLS parameters
-smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
-smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
-smtpd_use_tls=yes
+smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
+smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
+smtpd_use_tls = yes
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
 smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
 smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache