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Add postscreen whitelist syntax and examples (#3931)
9c559680
data/Dockerfiles/postfix/postfix.sh | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)Diff
diff --git a/data/Dockerfiles/postfix/postfix.sh b/data/Dockerfiles/postfix/postfix.sh
index 514fbccb..dffcfd44 100755
--- a/data/Dockerfiles/postfix/postfix.sh
+++ b/data/Dockerfiles/postfix/postfix.sh
@@ -358,7 +358,13 @@ fi
if [[ ! -f /opt/postfix/conf/custom_postscreen_whitelist.cidr ]]; then
echo "Creating dummy custom_postscreen_whitelist.cidr"
- echo '# Autogenerated by mailcow' > /opt/postfix/conf/custom_postscreen_whitelist.cidr
+ cat <<EOF > /opt/postfix/conf/custom_postscreen_whitelist.cidr
+# Autogenerated by mailcow
+# Rules are evaluated in the order as specified.
+# Blacklist 192.168.* except 192.168.0.1.
+# 192.168.0.1 permit
+# 192.168.0.0/16 reject
+EOF
fi
# Fix SMTP last login on slaves