From 7166e7d2b2a912fc85658527a15d2e04c31ddd98 Mon Sep 17 00:00:00 2001
From: Florent Daigniere <nextgens@freenetproject.org>
Date: Sat, 19 Feb 2022 18:37:37 +0100
Subject: [PATCH] Implement #2213: slow transports

---
 core/postfix/conf/main.cf   |  2 +-
 core/postfix/conf/master.cf | 16 ++++++++++++++++
 core/postfix/start.py       |  7 ++++---
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/core/postfix/conf/main.cf b/core/postfix/conf/main.cf
index 444dacad..1d66bcc3 100644
--- a/core/postfix/conf/main.cf
+++ b/core/postfix/conf/main.cf
@@ -80,7 +80,7 @@ virtual_mailbox_maps = ${podop}mailbox
 
 # Mails are transported if required, then forwarded to Dovecot for delivery
 relay_domains = ${podop}transport
-transport_maps = ${podop}transport
+transport_maps = lmdb:/etc/postfix/transport.map, ${podop}transport
 virtual_transport = lmtp:inet:{{ LMTP_ADDRESS }}
 
 # Sender and recipient canonical maps, mostly for SRS
diff --git a/core/postfix/conf/master.cf b/core/postfix/conf/master.cf
index 15613476..bec96a30 100644
--- a/core/postfix/conf/master.cf
+++ b/core/postfix/conf/master.cf
@@ -15,6 +15,22 @@ outclean  unix n       -       n       -       0       cleanup
   -o header_checks=pcre:/etc/postfix/outclean_header_filter.cf
   -o nested_header_checks=
 
+# Polite policy
+polite      unix  -       -       n       -       -       smtp
+  -o syslog_name=postfix-polite
+  -o polite_destination_concurrency_limit=3
+  -o polite_destination_rate_delay=0
+  -o polite_destination_recipient_limit=20
+  -o polite_destination_concurrency_failed_cohort_limit=10
+
+# Turtle policy
+turtle      unix  -       -       n       -       -       smtp
+  -o syslog_name=postfix-turtle
+  -o turtle_destination_concurrency_limit=1
+  -o turtle_destination_rate_delay=1
+  -o turtle_destination_recipient_limit=5
+  -o turtle_destination_concurrency_failed_cohort_limit=10
+
 # Internal postfix services
 pickup    unix  n       -       n       60      1       pickup
 cleanup   unix  n       -       n       -       0       cleanup
diff --git a/core/postfix/start.py b/core/postfix/start.py
index dc5015d7..fe93de86 100755
--- a/core/postfix/start.py
+++ b/core/postfix/start.py
@@ -74,9 +74,10 @@ if os.path.exists("/overrides/mta-sts-daemon.yml"):
 else:
     conf.jinja("/conf/mta-sts-daemon.yml", os.environ, "/etc/mta-sts-daemon.yml")
 
-if not os.path.exists("/etc/postfix/tls_policy.map.lmdb"):
-    open("/etc/postfix/tls_policy.map", "a").close()
-    os.system("postmap /etc/postfix/tls_policy.map")
+for policy in ['tls_policy', 'transport']:
+    if not os.path.exists(f'/etc/postfix/{policy}.map.lmdb'):
+        open(f'/etc/postfix/{policy}.map', 'a').close()
+        os.system(f'postmap /etc/postfix/{policy}.map')
 
 if "RELAYUSER" in os.environ:
     path = "/etc/postfix/sasl_passwd"