diff --git a/data/conf/postfix/main.cf b/data/conf/postfix/main.cf
index 83a252d8..beee0d0a 100644
--- a/data/conf/postfix/main.cf
+++ b/data/conf/postfix/main.cf
@@ -94,9 +94,9 @@ smtpd_tls_dh1024_param_file = /etc/ssl/mail/dhparams.pem
 smtpd_tls_eecdh_grade = auto
 smtpd_tls_exclude_ciphers = ECDHE-RSA-RC4-SHA, RC4, aNULL, DES-CBC3-SHA, ECDHE-RSA-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA
 smtpd_tls_loglevel = 1
-smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
+smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
 smtp_tls_protocols = !SSLv2, !SSLv3
-lmtp_tls_mandatory_protocols = !SSLv2, !SSLv3
+lmtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
 lmtp_tls_protocols = !SSLv2, !SSLv2, !SSLv3
 smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
 smtpd_tls_protocols = !SSLv2, !SSLv3