diff --git a/smtprelay/Dockerfile b/smtprelay/Dockerfile
new file mode 100644
index 0000000..3cbeb4c
--- /dev/null
+++ b/smtprelay/Dockerfile
@@ -0,0 +1,4 @@
+FROM alpine:edge
+RUN apk --update --no-cache add opensmtpd && \
+    install -d -m 0711 -v /var/spool/smtpd
+ENTRYPOINT smtpd -d
diff --git a/smtprelay/docker-compose.yml b/smtprelay/docker-compose.yml
new file mode 100644
index 0000000..3f51911
--- /dev/null
+++ b/smtprelay/docker-compose.yml
@@ -0,0 +1,15 @@
+version: '3'
+
+volumes:
+  spool:
+
+services:
+  smtprelay:
+    container_name: smtprelay
+    build: .
+    restart: on-failure
+    volumes:
+      - ./smtpd:/etc/smtpd:ro
+      - spool:/var/spool/smtpd
+    ports:
+      - 587:587
diff --git a/smtprelay/smtpd/cert.pem b/smtprelay/smtpd/cert.pem
new file mode 100644
index 0000000..01ee787
--- /dev/null
+++ b/smtprelay/smtpd/cert.pem
@@ -0,0 +1,33 @@
+-----BEGIN CERTIFICATE-----
+MIIFszCCA5ugAwIBAgIUYh+iI3IuwVOOeFMAKvcKQPyqjvMwDQYJKoZIhvcNAQEL
+BQAwaTELMAkGA1UEBhMCREUxFDASBgNVBAgMC0JyYW5kZW5idXJnMREwDwYDVQQH
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+krRNwR/uen8hKHAlvqkIHkLtqa3zj8bGlINPQk/Lz5dJUEb0Gu0igqHLSvcHf8ZK
+5rfjuuJsLDKFbsAHTMwRk57anChheBeWhGaHYDcuvzTiFr2jwumAw41fBEWc7ja1
+5f0T3gp6bHwurI2g1XvwQ7rftfVW7/siHGgXbfjYaexvoAvHKZy3sNf1ZySqCwy5
+s59sUAWupASpxRNxB6MdgJAnAe6uz1k=
+-----END CERTIFICATE-----
diff --git a/smtprelay/smtpd/creds b/smtprelay/smtpd/creds
new file mode 100644
index 0000000..c41d7e2
--- /dev/null
+++ b/smtprelay/smtpd/creds
@@ -0,0 +1,2 @@
+user1	$6$kHKLoDIKs/glvw9v$NlERi0VTXJw1Nxa6DQWv9k5DXZ5pvRIJo77j3CqpwJxhZkmvURClviSwyD1RLY7Y0EAlF44qFx7T1IfMwoGwl0
+user2	$6$MJI.2JXCp88rZbFg$Z5aiK3d001yycF21tXnWBbwsCyfDCLHPs0X1INM2Amj4GP/GxkV/NG.ZTELaD.BP3YOaCFo6PKqb2ns.Nmril.
diff --git a/smtprelay/smtpd/key.pem b/smtprelay/smtpd/key.pem
new file mode 100644
index 0000000..025030d
--- /dev/null
+++ b/smtprelay/smtpd/key.pem
@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQwIBADANBgkqhkiG9w0BAQEFAASCCS0wggkpAgEAAoICAQC6L7nh35knHsxI
+yewws66bQrym+zb7RAA+NlyySjO68lUhLdboZdYPxwTy6FXxr4N876CI0NOsieNM
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+bXrg+CeLXkHyZ28y2ulOO2pMvSQso08=
+-----END PRIVATE KEY-----
diff --git a/smtprelay/smtpd/smtpd.conf b/smtprelay/smtpd/smtpd.conf
new file mode 100644
index 0000000..8530a55
--- /dev/null
+++ b/smtprelay/smtpd/smtpd.conf
@@ -0,0 +1,11 @@
+pki "server" cert "/etc/smtpd/cert.pem"
+pki "server" key  "/etc/smtpd/key.pem"
+
+table creds file:/etc/smtpd/creds
+
+listen on eth0 port 587 tls-require pki "server" auth <creds> hostname smtprelay.codehal.de
+
+action "relay" relay
+
+match from auth for any action "relay"
+