X-Git-Url: https://git.ralfj.de/ansible.git/blobdiff_plain/55ed8162a42d0b5dba661bc95b809d398c61a9c1..bb0f118049b0f9e85ff03d74eb81ab7d71bf97aa:/roles/email/templates/main.cf

diff --git a/roles/email/templates/main.cf b/roles/email/templates/main.cf
index e8538ce..2d254f0 100644
--- a/roles/email/templates/main.cf
+++ b/roles/email/templates/main.cf
@@ -36,10 +36,10 @@ smtp_tls_security_level = dane
 
 {% if postfix.postscreen | default(False) %}
 # postscreen config
-postscreen_dnsbl_threshold = 2
+postscreen_dnsbl_threshold = 3
 postscreen_dnsbl_whitelist_threshold = -2
 postscreen_dnsbl_sites =
-	ix.dnsbl.manitu.net*2 sbl-xbl.spamhaus.org*2 truncate.gbudb.net*2
+	ix.dnsbl.manitu.net*2 sbl-xbl.spamhaus.org*3 truncate.gbudb.net*2
 	bl.spamcop.net bl.mailspike.net
 	swl.spamhaus.org*-2 list.dnswl.org=127.0.[0..255].[0..254]*-2
 postscreen_greet_action = enforce
@@ -65,6 +65,11 @@ smtpd_recipient_restrictions = permit_mynetworks, permit_tls_clientcerts,
     reject_non_fqdn_recipient,
     reject_non_fqdn_sender,
 
+# SMTP smuggling protection
+# <https://www.postfix.org/smtp-smuggling.html>
+smtpd_data_restrictions = reject_unauth_pipelining
+smtpd_discard_ehlo_keywords = chunking
+
 {% if postfix.relay_host is defined %}
 # Relay everything
 default_transport = smtp:{{ postfix.relay_host }}