diff --git a/mailserver.cf b/mailserver.cf
index ffff097..8d51fba 100644
--- a/mailserver.cf
+++ b/mailserver.cf
@@ -422,6 +422,7 @@ virtual_alias_maps = mysql:$(postfix_vimbadmin_sql.virtual_alias_maps)
 virtual_mailbox_domains = mysql:$(postfix_vimbadmin_sql.virtual_domains_maps)
 virtual_mailbox_maps = mysql:$(postfix_vimbadmin_sql.virtual_mailbox_maps) 
 inet_protocols = ipv4
+smtp_tls_security_level = may
 
 "
 		,