diff --git a/install/tpl/debian_postfix.conf.master b/install/tpl/debian_postfix.conf.master
index fa81944e733bfddac64c9917013560cd86e2943b..e17880e9506cd4cb03c5c314425a95009c42965d 100644
--- a/install/tpl/debian_postfix.conf.master
+++ b/install/tpl/debian_postfix.conf.master
@@ -30,4 +30,5 @@ header_checks = regexp:{config_dir}/header_checks
 mime_header_checks = regexp:{config_dir}/mime_header_checks
 nested_header_checks = regexp:{config_dir}/nested_header_checks
 body_checks = regexp:{config_dir}/body_checks
-owner_request_special = no
\ No newline at end of file
+owner_request_special = no
+smtp_tls_security_level = may
\ No newline at end of file
diff --git a/install/tpl/fedora_postfix.conf.master b/install/tpl/fedora_postfix.conf.master
index f273d3eeece4f944ea7d8bfce212b925518872f5..0911f2a7e5f59e1c14a0df236b51510b07fe97a3 100644
--- a/install/tpl/fedora_postfix.conf.master
+++ b/install/tpl/fedora_postfix.conf.master
@@ -27,4 +27,5 @@ header_checks = regexp:{config_dir}/header_checks
 mime_header_checks = regexp:{config_dir}/mime_header_checks
 nested_header_checks = regexp:{config_dir}/nested_header_checks
 body_checks = regexp:{config_dir}/body_checks
-inet_interfaces = all
\ No newline at end of file
+inet_interfaces = all
+smtp_tls_security_level = may
\ No newline at end of file
diff --git a/install/tpl/gentoo_postfix.conf.master b/install/tpl/gentoo_postfix.conf.master
index 9db3934f30b8a6470fdb993c0313c55fa0bde30a..90ed2859fba0e4895ebf404cce9751dfacea604a 100644
--- a/install/tpl/gentoo_postfix.conf.master
+++ b/install/tpl/gentoo_postfix.conf.master
@@ -27,4 +27,5 @@ header_checks = regexp:{config_dir}/header_checks
 mime_header_checks = regexp:{config_dir}/mime_header_checks
 nested_header_checks = regexp:{config_dir}/nested_header_checks
 body_checks = regexp:{config_dir}/body_checks
-inet_interfaces = all
\ No newline at end of file
+inet_interfaces = all
+smtp_tls_security_level = may
\ No newline at end of file
diff --git a/install/tpl/opensuse_postfix.conf.master b/install/tpl/opensuse_postfix.conf.master
index 9db3934f30b8a6470fdb993c0313c55fa0bde30a..90ed2859fba0e4895ebf404cce9751dfacea604a 100644
--- a/install/tpl/opensuse_postfix.conf.master
+++ b/install/tpl/opensuse_postfix.conf.master
@@ -27,4 +27,5 @@ header_checks = regexp:{config_dir}/header_checks
 mime_header_checks = regexp:{config_dir}/mime_header_checks
 nested_header_checks = regexp:{config_dir}/nested_header_checks
 body_checks = regexp:{config_dir}/body_checks
-inet_interfaces = all
\ No newline at end of file
+inet_interfaces = all
+smtp_tls_security_level = may
\ No newline at end of file