From 9fdf7c32023309e5b9c097cf7eaaf79bc2b6b00e Mon Sep 17 00:00:00 2001
From: Jakub Czajka <jakub@ekhem.eu.org>
Date: Sun, 6 Nov 2022 16:35:58 +0100
Subject: [PATCH] [postfix] Reject unlisted senders.

---
 postfix/main.cf | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/postfix/main.cf b/postfix/main.cf
index 2c78c94..e6d6217 100644
--- a/postfix/main.cf
+++ b/postfix/main.cf
@@ -33,6 +33,8 @@ alias_maps = pgsql:/etc/postfix/address_book.cf
 ## Deliver to dovecot.
 mailbox_transport = lmtp:unix:private/dovecot-lmtp
 
+smtpd_reject_unlisted_sender = yes
+
 # Message rewrite
 always_add_missing_headers = yes
 
-- 
2.39.5