diff --git a/README.md b/README.md
index 209e1d5b..cac9d67a 100644
--- a/README.md
+++ b/README.md
@@ -345,9 +345,10 @@ compatibility_level = 2
 # 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_session_cache_database = btree:${data_directory}/smtpd_scache
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
+smtp_tls_security_level = may
+smtpd_tls_security_level = may
 
 # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
 # information on enabling SSL in the smtp client.