diff --git a/conf/main.cf b/conf/main.cf
index 2ee7996..336bd7b 100644
--- a/conf/main.cf
+++ b/conf/main.cf
@@ -136,6 +136,10 @@ mail_owner = postfix
 #inet_interfaces = all
 #inet_interfaces = $myhostname
 #inet_interfaces = $myhostname, localhost
+inet_interfaces = localhost
+
+# Enable IPv4, and IPv6 if supported
+inet_protocols = all
 
 # The proxy_interfaces parameter specifies the network interface
 # addresses that this mail system receives mail on by way of a
@@ -180,7 +184,7 @@ mail_owner = postfix
 #
 # See also below, section "REJECTING MAIL FOR UNKNOWN LOCAL USERS".
 #
-#mydestination = $myhostname, localhost.$mydomain, localhost
+mydestination = $myhostname, localhost.$mydomain, localhost
 #mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
 #mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
 #	mail.$mydomain, www.$mydomain, ftp.$mydomain
@@ -407,7 +411,7 @@ unknown_local_recipient_reject_code = 550
 # "postfix reload" to eliminate the delay.
 #
 #alias_maps = dbm:/etc/aliases
-#alias_maps = hash:/etc/aliases
+alias_maps = hash:/etc/aliases
 #alias_maps = hash:/etc/aliases, nis:mail.aliases
 #alias_maps = netinfo:/aliases
 
@@ -418,7 +422,7 @@ unknown_local_recipient_reject_code = 550
 #
 #alias_database = dbm:/etc/aliases
 #alias_database = dbm:/etc/mail/aliases
-#alias_database = hash:/etc/aliases
+alias_database = hash:/etc/aliases
 #alias_database = hash:/etc/aliases, hash:/opt/majordomo/aliases
 
 # ADDRESS EXTENSIONS (e.g., user+foo)
@@ -488,7 +492,27 @@ unknown_local_recipient_reject_code = 550
 #
 # Cyrus IMAP over LMTP. Specify ``lmtpunix      cmd="lmtpd"
 # listen="/var/imap/socket/lmtp" prefork=0'' in cyrus.conf.
-#mailbox_transport = lmtp:unix:/var/imap/socket/lmtp
+#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.
 #
 # Cyrus IMAP via command line. Uncomment the "cyrus...pipe" and
 # subsequent line in master.cf.
@@ -508,8 +532,7 @@ unknown_local_recipient_reject_code = 550
 # 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
@@ -682,4 +705,41 @@ sample_directory =
 # readme_directory: The location of the Postfix README files.
 #
 readme_directory =
-inet_protocols = ipv4
+
+# TLS CONFIGURATION
+#
+# Basic Postfix TLS configuration by default with self-signed certificate
+# for inbound SMTP and also opportunistic TLS for outbound SMTP.
+
+# The full pathname of a file with the Postfix SMTP server RSA certificate
+# in PEM format. Intermediate certificates should be included in general,
+# the server certificate first, then the issuing CA(s) (bottom-up order).
+#
+smtpd_tls_cert_file = /etc/pki/tls/certs/postfix.pem
+
+# The full pathname of a file with the Postfix SMTP server RSA private key
+# in PEM format. The private key must be accessible without a pass-phrase,
+# i.e. it must not be encrypted.
+#
+smtpd_tls_key_file = /etc/pki/tls/private/postfix.key
+
+# Announce STARTTLS support to remote SMTP clients, but do not require that
+# clients use TLS encryption (opportunistic TLS inbound).
+#
+smtpd_tls_security_level = may
+
+# Directory with PEM format Certification Authority certificates that the
+# Postfix SMTP client uses to verify a remote SMTP server certificate.
+#
+smtp_tls_CApath = /etc/pki/tls/certs
+
+# The full pathname of a file containing CA certificates of root CAs
+# trusted to sign either remote SMTP server certificates or intermediate CA
+# certificates.
+#
+smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
+
+# Use TLS if this is supported by the remote SMTP server, otherwise use
+# plaintext (opportunistic TLS outbound).
+#
+smtp_tls_security_level = may
diff --git a/conf/master.cf b/conf/master.cf
index fd282dd..8d969c6 100644
--- a/conf/master.cf
+++ b/conf/master.cf
@@ -112,14 +112,14 @@ postlog   unix-dgram n  -       n       -       1       postlogd
 # Also specify in main.cf: cyrus_destination_recipient_limit=1
 #
 #cyrus     unix  -       n       n       -       -       pipe
-#  flags=DRX user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
+#  flags=DRX user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
 #
 # ====================================================================
 #
 # Old example of delivery via Cyrus.
 #
 #old-cyrus unix  -       n       n       -       -       pipe
-#  flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
+#  flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
 #
 # ====================================================================
 #