From 89761d12c45e33143bd5828ddf860df3aa4ce9c1 Mon Sep 17 00:00:00 2001
From: mendel5 <60322520+mendel5@users.noreply.github.com>
Date: Wed, 24 Apr 2024 12:15:32 +0200
Subject: [PATCH] Update README.md

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index 0a42c95..8b21d44 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,7 @@ Note: Some content is focused on Germany.
 - https://support.google.com/a/answer/2466563 Add your DMARC record
 - https://access.redhat.com/documentation/de-de/red_hat_enterprise_linux/4/html/reference_guide/s2-bind-zone-examples
 - https://domainregister.international/index.php/knowledgebase/134/Recommended-SOA-values.html
+- https://clients.prohosterz.com/index.php?rp=/knowledgebase/18/What-does-serial-or-refresh-or-retry-or-expire-or-minimum-or-and-TTL-mean.html
 
 ## Hoster
 ### Allgemein