Mine

debug_peer_list = 127.0.0.1
#soft_bounce = no
queue_directory = /var/spool/postfix
command_directory = /usr/local/sbin
daemon_directory = /usr/local/libexec/postfix
mail_owner = postfix

myhostname = mail.magicshells.com
mydomain = magicshells.com

myorigin = $myhostname
myorigin = $mydomain

#inet_interfaces = all
#inet_interfaces = $myhostname
#inet_interfaces = $myhostname, localhost

#
#proxy_interfaces =
#proxy_interfaces = 1.2.3.4

#
#mydestination = $myhostname, localhost.$mydomain, localhost
#mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,

#local_recipient_maps = unix:passwd.byname $alias_maps
#local_recipient_maps = proxy:unix:passwd.byname $alias_maps
#local_recipient_maps =

#unknown_local_recipient_reject_code = 450

#mynetworks_style = class
#mynetworks_style = subnet
mynetworks_style = host

#mynetworks = 168.100.189.0/28, 127.0.0.0/8
#mynetworks = $config_directory/mynetworks
#mynetworks = hash:/usr/local/etc/postfix/network_table
#mynetworks = 66.152.171.0/28

relay_domains = $mydestination

#relayhost = $mydomain
#relayhost = [gateway.my.domain]
#relayhost = [mailserver.isp.tld]
#relayhost = uucphost
#relayhost = [an.ip.add.ress]

#relay_recipient_maps = hash:/usr/local/etc/postfix/relay_recipients

#in_flow_delay = 1s

#alias_maps = dbm:/etc/aliases
#alias_maps = hash:/etc/aliases
#alias_maps = hash:/etc/aliases, nis:mail.aliases
#alias_maps = netinfo:/aliases

#alias_database = dbm:/etc/aliases
#alias_database = dbm:/etc/mail/aliases
#alias_database = hash:/etc/aliases
#alias_database = hash:/etc/aliases, hash:/opt/majordomo/aliases

#recipient_delimiter = +

#home_mailbox = Maildir/
home_mailbox = /var/mail/.%u/

mail_spool_directory = /var/spool/squirrelmail
#mail_spool_directory = /var/spool/mail

#mailbox_command = /some/where/procmail
#mailbox_command = /some/where/procmail -a "$EXTENSION"

#mailbox_transport = lmtp:unix:/file/name
#mailbox_transport = cyrus

#fallback_transport = lmtp:unix:/file/name
#fallback_transport = cyrus
#fallback_transport =

#luser_relay = $user@other.host
#luser_relay = $local@other.host
#luser_relay = admin+$local

header_checks = regexp:/usr/local/etc/postfix/header_checks

#fast_flush_domains = $relay_domains

#smtpd_banner = $myhostname ESMTP $mail_name
#smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)

local_destination_concurrency_limit = 3
default_destination_concurrency_limit = 20

debug_peer_level = 2

#debug_peer_list = 127.0.0.1
#debug_peer_list = some.domain

debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         xxgdb $daemon_directory/$process_name $process_id & sleep 5

sendmail_path = /usr/local/sbin/sendmail

newaliases_path = /usr/local/bin/newaliases

mailq_path = /usr/local/bin/mailq

setgid_group = maildrop

html_directory = no

manpage_directory = /usr/local/man

sample_directory = /usr/local/etc/postfix

readme_directory = no