diff --git a/CHANGELOG.md b/CHANGELOG.md
index f462e126..f0b8a770 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## untagged
 
+- change default for delete_mails_after from 40 to 20 days
+  ([#300]https://github.com/deltachat/chatmail/pull/300)
+
 - fix writing of multiple obs repositories in `/etc/apt/sources.list`
   ([#272](https://github.com/deltachat/chatmail/issues/272))
 
diff --git a/scripts/dovecot/dovecot-build/dovecot b/scripts/dovecot/dovecot-build/dovecot
new file mode 160000
index 00000000..4b7f802c
--- /dev/null
+++ b/scripts/dovecot/dovecot-build/dovecot
@@ -0,0 +1 @@
+Subproject commit 4b7f802ca1a8ca9b744e731854d7273939ef5de6