Update valid-config

valid-config.edn

@@ -3,7 +3,7 @@
 :fqdn "test.de"
 :issuer "staging"
 :mailer-from "test@test.de"
-:mailer-host-port "123"
+:mailer-host-port "test.de:123"
 :service-whitelist-domains "test.de"
 :service-noreply-address "noreply@test.de"
  }