diff --git a/core/admin/mailu/internal/views/postfix.py b/core/admin/mailu/internal/views/postfix.py
index b2da80f2..c337c24e 100644
--- a/core/admin/mailu/internal/views/postfix.py
+++ b/core/admin/mailu/internal/views/postfix.py
@@ -35,11 +35,8 @@ def postfix_alias_map(alias):
         return flask.abort(404)
 
 
-@internal.route("/postfix/spoofed/<email>")
-def postfix_spoofed(email):
-    return flask.abort(404)
-
-
 @internal.route("/postfix/transport/<email>")
 def postfix_transport(email):
-    return flask.abort(404)
+    localpart, domain = email.split('@', 1) if '@' in email else (None, email)
+    relay = models.Relay.query.get(domain) or flask.abort(404)
+    return flask.jsonify("smtp:[{}]".format(relay.smtp))
diff --git a/core/postfix/conf/main.cf b/core/postfix/conf/main.cf
index 1306457a..43a41fe7 100644
--- a/core/postfix/conf/main.cf
+++ b/core/postfix/conf/main.cf
@@ -62,8 +62,8 @@ virtual_mailbox_domains = ${podop}domain
 virtual_mailbox_maps = ${podop}mailbox
 
 # Mails are transported if required, then forwarded to Dovecot for delivery
-# relay_domains = ${podop}transport
-# transport_maps = ${podop}transport
+relay_domains = ${podop}transport
+transport_maps = ${podop}transport
 virtual_transport = lmtp:inet:{{ HOST_LMTP }}
 
 # In order to prevent Postfix from running DNS query, enforce the use of the
diff --git a/core/postfix/start.py b/core/postfix/start.py
index bb0e1f85..04d63456 100755
--- a/core/postfix/start.py
+++ b/core/postfix/start.py
@@ -17,7 +17,6 @@ def start_podop():
 		("alias", "url", "http://admin/internal/postfix/alias/§"),
 		("domain", "url", "http://admin/internal/postfix/domain/§"),
         ("mailbox", "url", "http://admin/internal/postfix/mailbox/§"),
-        ("spoofed", "url", "http://admin/internal/postfix/spoofed/§"),
     ])
 
 convert = lambda src, dst: open(dst, "w").write(jinja2.Template(open(src).read()).render(**os.environ))