git subrepo clone https://github.com/mailcow/mailcow-dockerized.git mailcow/src/mailcow-dockerized

subrepo: subdir:   "mailcow/src/mailcow-dockerized"
  merged:   "a832becb"
upstream: origin:   "https://github.com/mailcow/mailcow-dockerized.git"
  branch:   "master"
  commit:   "a832becb"
git-subrepo: version:  "0.4.3"
  origin:   "???"
  commit:   "???"
Change-Id: If5be2d621a211e164c9b6577adaa7884449f16b5
diff --git a/mailcow/src/mailcow-dockerized/data/web/inc/lib/sieve/extensions/mailbox.xml b/mailcow/src/mailcow-dockerized/data/web/inc/lib/sieve/extensions/mailbox.xml
new file mode 100644
index 0000000..c21960f
--- /dev/null
+++ b/mailcow/src/mailcow-dockerized/data/web/inc/lib/sieve/extensions/mailbox.xml
@@ -0,0 +1,8 @@
+<?xml version='1.0' standalone='yes'?>
+
+<extension name="mailbox">
+
+	<test name="mailboxexists">
+    <parameter type="string" name="folder" />
+	</test>
+</extension>