Adding upstream version 1.37.0.upstream/1.37.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 18 insertions, 9 deletions

diff --git a/collectors/python.d.plugin/postfix/README.md b/collectors/python.d.plugin/postfix/README.md
index ac16962a5..1a546c614 100644
--- a/collectors/python.d.plugin/postfix/README.md
+++ b/collectors/python.d.plugin/postfix/README.md
@@ -6,22 +6,31 @@ sidebar_label: "Postfix"
 
 # Postfix monitoring with Netdata
 
-Monitors MTA email queue statistics using postqueue tool.  
+Monitors MTA email queue statistics using [postqueue](http://www.postfix.org/postqueue.1.html) tool.
 
-Execute `postqueue -p` to grab postfix queue.
+The collector executes  `postqueue -p` to get Postfix queue statistics.
 
-It produces only two charts:
+## Requirements
 
-1.  **Postfix Queue Emails**
+Postfix has internal access controls that limit activities on the mail queue. By default, all users are allowed to view
+the queue. If your system is configured with stricter access controls, you need to grant the `netdata` user access to
+view the mail queue. In order to do it, add `netdata` to `authorized_mailq_users` in the `/etc/postfix/main.cf` file.
 
-    -   emails
+See the `authorized_mailq_users` setting in
+the [Postfix documentation](https://www.postfix.org/postconf.5.html) for more details.
 
-2.  **Postfix Queue Emails Size** in KB
+## Charts
 
-    -   size
+It produces only two charts:
 
-Configuration is not needed.
+1. **Postfix Queue Emails**
 
----
+    - emails
 
+2. **Postfix Queue Emails Size** in KB
 
+    - size
+
+## Configuration
+
+Configuration is not needed.