diff --git a/confd/conf.d/setup_relayhost.toml b/confd/conf.d/setup_relayhost.toml
index ae97d06..1aeb64a 100644
--- a/confd/conf.d/setup_relayhost.toml
+++ b/confd/conf.d/setup_relayhost.toml
@@ -4,6 +4,7 @@ dest = "/start.d/setup_relayhost"
 mode = "0755"
 keys = [
 "/relayhost",
+"/smtp/fallback/relay",
 "/smtp/sasl/auth/enable",
 "/smtp/sasl/password/maps",
 "/smtp/sasl/security/options",
diff --git a/confd/templates/setup_relayhost.tmpl b/confd/templates/setup_relayhost.tmpl
index df89e11..b3a025b 100644
--- a/confd/templates/setup_relayhost.tmpl
+++ b/confd/templates/setup_relayhost.tmpl
@@ -3,6 +3,7 @@
 # These postfix settings allow for sending all mail through a relay host.
 
 {{ with getv "/relayhost" }}postconf relayhost='{{.}}'{{ end }}
+{{ with getv "/smtp/fallback/relay" }}postconf smtp_fallback_relay='{{.}}'{{ end }}
 {{ with getv "/smtp/sasl/auth/enable" }}postconf smtp_sasl_auth_enable='{{.}}'{{ end }}
 {{ with getv "/smtp/sasl/password/maps" }}postconf smtp_sasl_password_maps='{{.}}'{{ end }}
 {{ with getv "/smtp/sasl/security/options" }}postconf smtp_sasl_security_options='{{.}}'{{ end }}