diff --git a/core/rspamd/conf/options.inc b/core/rspamd/conf/options.inc
index 22bae565..6ccbfb0a 100644
--- a/core/rspamd/conf/options.inc
+++ b/core/rspamd/conf/options.inc
@@ -1,3 +1 @@
-{% if RELAYNETS %}
-local_networks = [{{ RELAYNETS }}];
-{% endif %}
+local_networks = [{{ SUBNET }}{% if SUBNET6 %}, {{ SUBNET6 }}{% endif %}{% if RELAYNETS %}, {{ RELAYNETS }}{% endif %}];
diff --git a/towncrier/newsfragments/2635.bugfix b/towncrier/newsfragments/2635.bugfix
new file mode 100644
index 00000000..7c7a3f15
--- /dev/null
+++ b/towncrier/newsfragments/2635.bugfix
@@ -0,0 +1 @@
+Fix sieve/out of office replies by adding SUBNET to rspamd's local_networks