From 7339bd446ee92dc5c8c20c14e40eb0219ebd4bea Mon Sep 17 00:00:00 2001
From: andryyy <andre.peters@debinux.de>
Date: Sat, 8 Apr 2017 23:37:13 +0200
Subject: [PATCH] How to add a relayhost

---
 docs/first_steps.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/docs/first_steps.md b/docs/first_steps.md
index 21c418db..ab7876dc 100644
--- a/docs/first_steps.md
+++ b/docs/first_steps.md
@@ -136,6 +136,29 @@ server {
 }
 ```
 
+## Optional: Setup a relayhost
+
+Insert these lines to `data/conf/postfix/main.cf`. "relayhost" does already exist (empty), just change its value.
+```
+relayhost = [your-relayhost]:587
+smtp_sasl_password_maps = hash:/opt/postfix/conf/smarthost_passwd
+smtp_sasl_auth_enable = yes
+```
+
+Create the credentials file:
+```
+echo "your-relayhost username:password" > data/conf/postfix/smarthost_passwd
+```
+
+Run:
+```
+docker-compose exec postfix-mailcow postmap /opt/postfix/conf/smarthost_passwd
+docker-compose exec postfix-mailcow chown root:postfix /opt/postfix/conf/smarthost_passwd /opt/postfix/conf/smarthost_passwd.db
+docker-compose exec postfix-mailcow chmod 660 /opt/postfix/conf/smarthost_passwd /opt/postfix/conf/smarthost_passwd.db
+docker-compose exec postfix-mailcow postfix reload
+```
+
+
 ## Install a local MTA
 
 The easiest option would be to disable the listener on port 25/tcp.