1. env desc
my email server is protected behind FW, and is running in internal IP, with hostname: mail.in.my_domian.com
and its internet ip/name is mail.my_domain.com

it is rdr to internal IP by pf.

for dns system, mx is set correct.

2. problem desc:
Now I can send email from my_domain.com to other_domain (! my_domain), and also can get email from other_domian.

but I can't send email from my_domain to my_domain;


following is the rule I used, any help?


3. main configuration of smtpd.conf
=======
listen on egress tls   auth-optional  	<passwd>        		# MTA
listen on egress smtps auth       	<passwd>      			# MSA (auth required)
listen on egress port  submission  tls-require auth <passwd> # MSA (auth required)

listen on lo0
listen on lo0 port 10026 tag SPAM_IN
listen on lo0 port 10028 tag DKIM_OUT


action vusers_lmtp_deliver     lmtp "/var/dovecot/lmtp" rcpt-to virtual <users>
action local_lmtp_deliver      lmtp "/var/dovecot/lmtp" rcpt-to alias <aliases>
action relay_spampd            relay host smtp://127.0.0.1:10025 # send to spampd
action relay_dkimproxy_out     relay host smtp://127.0.0.1:10027 # send to dkimproxy_out
action "relay"                 relay

match \
    from local \
    for local \
    action local_lmtp_deliver

match \
    tag SPAM_IN \
    for domain <domains> \
    action vusers_lmtp_deliver

match \
    tag SPAM_IN \
    for local \
    action local_lmtp_deliver

match \
    tag DKIM_OUT \
    for domain <domains> \
    action relay_spampd

match \
    tag DKIM_OUT \
    for any \
    action "relay"

match \
    from local \
    for any \
    action relay_dkimproxy_out

match \
    auth \
    from any \
    for any \
    action relay_dkimproxy_out

match \
    from any \
    for domain <domains> \
    action relay_spampd