diff --git a/postfix/main.cf b/postfix/main.cf
index 7206c87..776ee6c 100644
--- a/postfix/main.cf
+++ b/postfix/main.cf
@@ -30,6 +30,7 @@ html_directory = no
 mailbox_size_limit = 1024000000
 message_size_limit = 51200000
 
+smtp_tls_security_level = may
 smtpd_tls_loglevel = 1
 smtpd_use_tls = yes
 smtpd_tls_protocols = !SSLv2, !SSLv3