diff --git a/smtp-relay/README.md b/smtp-relay/README.md
new file mode 100644
index 0000000..fc18d89
--- /dev/null
+++ b/smtp-relay/README.md
@@ -0,0 +1,4 @@
+# smtp-relay
+
+ Simple postfix relay host for your Docker containers. Based on Alpine Linux.
+
diff --git a/smtp-relay/docker-compose.yaml b/smtp-relay/docker-compose.yaml
new file mode 100644
index 0000000..99e2fa1
--- /dev/null
+++ b/smtp-relay/docker-compose.yaml
@@ -0,0 +1,15 @@
+version: '3'
+services:
+  postfix:
+    image: boky/postfix
+    environment:
+      - RELAYHOST=${RELAYHOST}
+      - RELAYHOST_USERNAME=${RELAYHOST_USERNAME}
+      - RELAYHOST_PASSWORD=${RELAYHOST_PASSWORD}
+      - MASQUERADED_DOMAINS=${MASQUERADED_DOMAINS}
+    networks:
+      - smtp_relay
+
+networks:
+  smtp_relay:
+    name: smtp_relay