X-Git-Url: https://git.ralfj.de/ansible.git/blobdiff_plain/02ac218b8d01b532c9ea483ef38d688ff923c58c..bb0f118049b0f9e85ff03d74eb81ab7d71bf97aa:/roles/email/templates/main.cf

diff --git a/roles/email/templates/main.cf b/roles/email/templates/main.cf
index 01c2185..2d254f0 100644
--- a/roles/email/templates/main.cf
+++ b/roles/email/templates/main.cf
@@ -13,7 +13,7 @@ local_recipient_maps = $alias_maps
 
 {% if 'letsencrypt' in group_names %}
 # TLS server parameters
-smtpd_tls_cert_file=/etc/ssl/mycerts/letsencrypt/live.crt+chain
+smtpd_tls_cert_file=/etc/ssl/mycerts/letsencrypt/live.crt
 smtpd_tls_key_file=/etc/ssl/private/letsencrypt/live.key
 smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
 smtpd_tls_security_level = may
@@ -39,14 +39,17 @@ smtp_tls_security_level = dane
 postscreen_dnsbl_threshold = 3
 postscreen_dnsbl_whitelist_threshold = -2
 postscreen_dnsbl_sites =
-	ix.dnsbl.manitu.net*2 sbl-xbl.spamhaus.org*2
-	bl.spamcop.net dnsbl.sorbs.net bl.mailspike.net
+	ix.dnsbl.manitu.net*2 sbl-xbl.spamhaus.org*3 truncate.gbudb.net*2
+	bl.spamcop.net bl.mailspike.net
 	swl.spamhaus.org*-2 list.dnswl.org=127.0.[0..255].[0..254]*-2
 postscreen_greet_action = enforce
 postscreen_dnsbl_action = enforce
 postscreen_pipelining_enable = yes
 postscreen_non_smtp_command_enable = yes
 postscreen_bare_newline_enable = yes
+postscreen_access_list = permit_mynetworks,
+	cidr:$config_directory/postscreen_access.cidr
+postscreen_blacklist_action = enforce
 {% endif %}
 
 # control relay access
@@ -62,6 +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 }}
@@ -139,4 +147,4 @@ smtpd_delay_reject = yes
 disable_vrfy_command = yes
 recipient_delimiter = {{ postfix.recipient_delimiter | default("+") }}
 delay_warning_time = 4h
-message_size_limit = 21384000
+message_size_limit = 30100100