--- postfix-2.2.5/conf/main.cf.cyrus	2005-11-11 14:57:34.000000000 +0100
+++ postfix-2.2.5/conf/main.cf	2005-11-11 14:58:09.000000000 +0100
@@ -452,7 +452,29 @@
 # the main.cf file, otherwise the SMTP server will reject mail for    
 # non-UNIX accounts with "User unknown in local recipient table".
 #
-#mailbox_transport = lmtp:unix:/file/name
+#mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
+
+# If using the cyrus-imapd IMAP server deliver local mail to the IMAP
+# server using LMTP (Local Mail Transport Protocol), this is prefered
+# over the older cyrus deliver program by setting the
+# mailbox_transport as below:
+#
+# mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
+#
+# The efficiency of LMTP delivery for cyrus-imapd can be enhanced via
+# these settings.
+#
+# local_destination_recipient_limit = 300
+# local_destination_concurrency_limit = 5
+#
+# Of course you should adjust these settings as appropriate for the
+# capacity of the hardware you are using. The recipient limit setting
+# can be used to take advantage of the single instance message store
+# capability of Cyrus. The concurrency limit can be used to control
+# how many simultaneous LMTP sessions will be permitted to the Cyrus
+# message store. 
+#
+# To use the old cyrus deliver program you have to set:
 #mailbox_transport = cyrus
 
 # The fallback_transport specifies the optional transport in master.cf
@@ -469,8 +491,7 @@
 # the main.cf file, otherwise the SMTP server will reject mail for    
 # non-UNIX accounts with "User unknown in local recipient table".
 #
-#fallback_transport = lmtp:unix:/file/name
-#fallback_transport = cyrus
+#fallback_transport = lmtp:unix:/var/lib/imap/socket/lmtp
 #fallback_transport =
 
 # The luser_relay parameter specifies an optional destination address