Postfix 寄信問題 - Linux

請問各位先進
最近在練習架設Postfix
現在有些問題想請教各位

問題如下
無法寄信給自己，例如本機有帳號ABC@domain
但是卻無法寄信給該帳號
寄給其他外網的Domain則可以將信件寄出去

其他狀況說明
maillog裡發現到無法連線到本機的外部IP假設外部IP是59.3.3.3
有 telnet 59.3.3.3 25 time out的訊息，但可以ping到

但是如果用外網機則可以成功telnet到該台主機
Server 本身自己用Telnet localhost 25 也可以看到歡迎訊息

有防火牆，已經設定好NAT，所以外網可以Telnet 25進去


請問各位先進，是不是我哪邊的設定有問題呢

postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd
$daemon_directory/$process_name $process_id & sleep 5
home_mailbox = Mailbox
html_directory = no
inet_interfaces = all
inet_protocols = ipv4
local_recipient_maps =
mail_owner = postfix
mail_spool_directory = /var/mail
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mydomain = abc.com
myhostname = mail.abc.com
mynetworks = 192.168.21.0/24, 192.168.2.0/24, 192.168.1.0/24, 192.168.3.0/24
, 127.0.0.0/8
mynetworks_style = subnet
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.10.1/README_FILES
sample_directory = /usr/share/doc/postfix-2.10.1/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP $mail_name
unknown_local_recipient_reject_code = 550

maillog
沒修改的話是出現 connect time out
如果修改了mydestination 把$mydomain拿掉就會是原本的問題，加上去後會是新的問題
maillog就會變成下面的狀況
Nov 2 21:02:06 mail postfix/local[25904]: 8FD0850D520A:
to=<[email protected]>, relay=local, delay=0.24,
delays=0.05/0.18/0/0.02, dsn=5.1.1, status=bounced (unknown user: "soarhung")
Nov 2 21:02:06 mail postfix/qmgr[25823]: 8FD0850D520A: removed


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