From 1f916f863db4b974b926476444ba673fd2c3d3d0 Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Tue, 14 Jun 2022 09:13:31 +0200
Subject: [PATCH] install_postfix_: add section for (commented) parameter
 'smtp_address_preference'.

---
 install_postfix_advanced.sh | 6 ++++++
 install_postfix_base.sh     | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/install_postfix_advanced.sh b/install_postfix_advanced.sh
index 93fedad..f84d2b0 100755
--- a/install_postfix_advanced.sh
+++ b/install_postfix_advanced.sh
@@ -1185,6 +1185,12 @@ mynetworks =
 smtp_bind_address = $IPV4
 smtp_bind_address6 = $IPV6
 
+# The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP client will try first,
+# when a destination has IPv6 and IPv4 addresses with equal MX preference. This feature
+# has no effect unless the inet_protocols setting enables both IPv4 and IPv6.
+#
+#smtp_address_preference = ipv4
+
 EOF
 else
    cat <<EOF >> /etc/postfix/main.cf
diff --git a/install_postfix_base.sh b/install_postfix_base.sh
index a650121..5e52522 100755
--- a/install_postfix_base.sh
+++ b/install_postfix_base.sh
@@ -546,6 +546,12 @@ mynetworks =
 #smtp_bind_address = $IPV4
 #smtp_bind_address6 = $IPV6
 
+## - The address type ("ipv6", "ipv4" or "any") that the Postfix SMTP client will try first,
+## - when a destination has IPv6 and IPv4 addresses with equal MX preference. This feature
+## - has no effect unless the inet_protocols setting enables both IPv4 and IPv6.
+## -
+#smtp_address_preference = ipv4
+
 EOF
 else
    cat <<EOF >> /etc/postfix/main.cf