postconf -n for a live Ubuntu 12.04 mail server

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
dovecot_destination_recipient_limit = 1
home_mailbox = Maildir/
inet_interfaces = all
inet_protocols = ipv4
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
mailman_destination_recipient_limit = 1
message_size_limit = 26214400
mydomain = example.com
myhostname = host.exapmle.com
mynetworks = 127.0.0.0/8 [::1]/128 1.2.3.4/26 2.2.3.4
myorigin = $mydomain
readme_directory = no
recipient_delimiter = +
relay_domains = lists.example.com
relay_recipient_maps =
relayhost =
smtp_tls_note_starttls_offer = yes
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_data_restrictions = reject_unauth_pipelining, reject_multi_recipient_bounce, permit
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks permit_sasl_authenticated reject_non_fqdn_hostname reject_invalid_hostname permit
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_pipelining reject_non_fqdn_recipient reject_unknown_recipient_domain check_sender_access hash:/etc/postfix/sender_access reject_unauth_destination check_recipient_access hash:/etc/postfix/recipient_access check_helo_access hash:/etc/postfix/secondary_mx_access reject_rbl_client zen.spamhaus.org check_policy_service inet:127.0.0.1:60000 permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_exceptions_networks = $mynetworks
smtpd_sasl_local_domain =
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_sender, reject_unknown_sender_domain, permit
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_tls_auth_only = no
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom
transport_maps = hash:/etc/postfix/transport
virtual_alias_maps = hash:/etc/postfix/virtual
virtual_gid_maps = static:8
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = /etc/postfix/virtual_domains
virtual_mailbox_maps = hash:/etc/postfix/vmailbox
virtual_minimum_uid = 150
virtual_transport = dovecot
virtual_uid_maps = static:150