From 2ed4c40a0cf43616e1d9c3d6aaa8b840e02f83aa Mon Sep 17 00:00:00 2001
From: Tom Hendrikx <tom@whyscream.net>
Date: Fri, 2 Feb 2024 23:10:22 +0100
Subject: [PATCH] Ignore but not drop NOQUEUE events while aggregating

---
 51-filter-postfix-aggregate.conf | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/51-filter-postfix-aggregate.conf b/51-filter-postfix-aggregate.conf
index 0a6cd03..3b2492e 100644
--- a/51-filter-postfix-aggregate.conf
+++ b/51-filter-postfix-aggregate.conf
@@ -2,7 +2,9 @@ filter {
   if ![postfix_queueid] {
     drop {}
   } else if [postfix_queueid] == "NOQUEUE" {
-    drop {}
+    # Ignore events where the queueid is NOQUEUE, they can't be aggregated.
+    # The empty mutate filter serves as a 'noop',
+    mutate {}
   } else if [program] == "postfix/qmgr" and [postfix_from] {
     aggregate {
       task_id => "%{postfix_queueid}"