diff --git a/freeposte.env b/freeposte.env
index 4148b912..f8e3a7c3 100644
--- a/freeposte.env
+++ b/freeposte.env
@@ -23,5 +23,8 @@ POSTMASTER=admin
 # internal network (default to 172.17.0.0/16)
 RELAYNETS=172.16.0.0/12
 
+# Will relay all outgoing mails if configured
+RELAYHOST=
+
 # Fetchmail delay
-FETCHMAIL_DELAY=600
\ No newline at end of file
+FETCHMAIL_DELAY=600
diff --git a/postfix/conf/main.cf b/postfix/conf/main.cf
index 6cbeca97..f9657b80 100644
--- a/postfix/conf/main.cf
+++ b/postfix/conf/main.cf
@@ -14,6 +14,8 @@ alias_maps = hash:/etc/aliases
 sql = sqlite:${config_directory}/
 # Only accept virtual emails
 mydestination =
+# Relayhost if any is configured
+relayhost = {{ RELAYHOST }}
 
 ###############
 # TLS