From 2e6c22131f8870d2c808129ba30643ac5a88ddab Mon Sep 17 00:00:00 2001
From: Son NK <>
Date: Mon, 24 Aug 2020 20:12:43 +0200
Subject: [PATCH] Enable TLS on Postfix submission

---
 README.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/README.md b/README.md
index cac9d67a..2900fe5c 100644
--- a/README.md
+++ b/README.md
@@ -428,6 +428,21 @@ Finally, restart Postfix
 sudo systemctl restart postfix
 ```
 
+#### [Optional] Enable TLS on Postfix submission
+
+In case your Postfix server is on another server, it's recommended to enable TLS on Postfix submission to 
+secure the connection between SimpleLogin email handler and Postfix.
+
+This can be enabled by adding those lines at the end of `/etc/postfix/master.cf`
+
+```
+submission inet n       -       y       -       -       smtpd
+  -o syslog_name=postfix/submission
+  -o smtpd_tls_security_level=encrypt
+  -o smtpd_sasl_auth_enable=yes
+  -o smtpd_tls_auth_only=yes
+```
+
 
 ### Run SimpleLogin Docker containers