initial commit

1 files changed, 11 insertions, 0 deletions

diff --git a/roles/postfix/files/header_checks b/roles/postfix/files/header_checks
new file mode 100644
index 0000000..f655904
--- /dev/null
+++ b/roles/postfix/files/header_checks
@@ -0,0 +1,11 @@
+#Block attachments with executable extensions
+/name=[^>]*\.(exe|pif|com|dll|vbs|bat|sh|bash|so|zip|tar|gz|cpio)/ REJECT
+# Block message/partial vulnerability
+/message\/partial/ REJECT
+# CVE-2022-1328 mitigation - block messages with uuencode
+/^Content-Transfer-Encoding:.*uuencode.*/       REJECT
+# Remove Received string that is created when spamassassin reinjects message into postfix
+# This is to prevent leaking the userid of the spamassassin user
+/^Received:.*userid.*/  IGNORE
+# Remove User-Agent strings from headers
+/^User-Agent: .*/       IGNORE