From 5fa87fbdf737c2d8836f24e494361c5f9bb949e7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20S=C3=A4nger?= <thomas@gecko.space>
Date: Wed, 4 Sep 2019 17:37:28 +0200
Subject: [PATCH 1/2] front: advertise real capabilites of mail-backends

---
 core/nginx/conf/nginx.conf | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/nginx/conf/nginx.conf b/core/nginx/conf/nginx.conf
index 1ffb44a2..fcd4bfd7 100644
--- a/core/nginx/conf/nginx.conf
+++ b/core/nginx/conf/nginx.conf
@@ -193,6 +193,11 @@ mail {
     ssl_session_cache shared:SSLMAIL:50m;
     {% endif %}
 
+    # Advertise real capabilites of backends (postfix/dovecot)
+    smtp_capabilities PIPELINING SIZE {{ MESSAGE_SIZE_LIMIT }} ETRN ENHANCEDSTATUSCODES 8BITMIME DSN CHUNKING;
+    pop3_capabilities TOP UIDL RESP-CODES PIPELINING AUTH-RESP-CODE USER;
+    imap_capabilities IMAP4 IMAP4rev1 UIDPLUS SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+;
+
     # Default SMTP server for the webmail (no encryption, but authentication)
     server {
       listen 10025;

From 3245fb5112ab8846ab91b7500f7c544993a78886 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20S=C3=A4nger?= <thomas@gecko.space>
Date: Wed, 4 Sep 2019 19:04:24 +0200
Subject: [PATCH 2/2] changelog for capability-advertisement

---
 towncrier/newsfragments/1160.feature | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 towncrier/newsfragments/1160.feature

diff --git a/towncrier/newsfragments/1160.feature b/towncrier/newsfragments/1160.feature
new file mode 100644
index 00000000..bc5231cc
--- /dev/null
+++ b/towncrier/newsfragments/1160.feature
@@ -0,0 +1 @@
+Advertise correct mail capabilities through the front-container, this also enables support for PIPELINING in mail-protocols and IMAP IDLE which is a (potential) performance gain.