From ac42e95f1ab8fbc2510e67746cc183b73e583479 Mon Sep 17 00:00:00 2001 From: Quentin Dufour Date: Mon, 25 Dec 2023 14:00:36 +0100 Subject: update smtp server security conf --- cluster/prod/app/email/config/postfix/main.cf | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'cluster/prod/app/email/config') diff --git a/cluster/prod/app/email/config/postfix/main.cf b/cluster/prod/app/email/config/postfix/main.cf index a83e5ec..5593716 100644 --- a/cluster/prod/app/email/config/postfix/main.cf +++ b/cluster/prod/app/email/config/postfix/main.cf @@ -77,7 +77,11 @@ smtpd_relay_restrictions = permit_mynetworks reject_unauth_destination -smtpd_data_restrictions = reject_unauth_pipelining +# Disable SMTP smuggling attacks +# https://www.postfix.org/smtp-smuggling.html +smtpd_forbid_unauth_pipelining = yes +smtpd_discard_ehlo_keywords = chunking +smtpd_forbid_bare_newline = yes smtpd_client_connection_rate_limit = 2 -- cgit v1.2.3