diff --git a/ubuntu/opensmtpd/smtpd_pre.conf b/ubuntu/opensmtpd/smtpd_pre.conf
new file mode 100644
index 0000000..f076a64
--- /dev/null
+++ b/ubuntu/opensmtpd/smtpd_pre.conf
@@ -0,0 +1,14 @@
+listen on 0.0.0.0
+listen on ::
+
+table aliases file:/etc/smtpd/aliases
+
+queue ttl 4d
+bounce warn-interval 1h, 6h, 2d
+
+smtp max-message-size 35M
+
+table authinfo db:/etc/smtpd/authinfo.db
+action default relay host "smtps://user@mailhost.neurotec.uni-bremen.de:465" auth <authinfo> tls no-verify
+match from any for any action default
+