diff --git a/etc/inbucket.conf b/etc/inbucket.conf
index 433958f..ae84d21 100644
--- a/etc/inbucket.conf
+++ b/etc/inbucket.conf
@@ -101,11 +101,6 @@ retention.minutes=240
 # to purge.
 retention.sleep.millis=100
 
-# Maximum number of messages we will store in a single mailbox. If this
-# number is exceeded, the oldest message in the box will be deleted each
-# time a new message is received for it.
-mailbox.message.cap=100
-
 # Maximum number of messages we will store in a single mailbox. If this
 # number is exceeded, the oldest message in the box will be deleted each
 # time a new message is received for it.