SMTP in problem

I'm testing inbound connections using a port listener software.
all ports are working, only port 25 fail
this is what I use to route inbound connections:
access-list outside_access_in extended permit tcp any host 63.x.y.26 eq 951
access-list outside_access_in extended permit tcp any host 63.x.y.27 eq 952
static (inside,outside) tcp 63.x.y.26 951 192.168.200.2 951 netmask 255.255.255.255
static (inside,outside) tcp 63.x.y.27 952 192.168.200.2 952 netmask 255.255.255.255
using the exact command with port 25 replacing port 951\952 fail.
any reason?
is there a different way of testing SMTP inbound traffic (test environment - no SMTP server)?
which log records will show me what exactly happen to those incoming packets that never show on the port listener?

it is NOT working
first, I had a problem adding these static commands - the first was good (after deleting the previous statics) but the second produced this error:
ERROR: duplicate of existing static
TCP inside:192.168.200.6/25 to outside:63.x.y.26/25 netmask 255.255.255.255
the current config include this:
config;
ASA# sh run | inc static
static (inside,outside) tcp 63.x.y.28 953 192.168.200.2 953 netmask 255.255.255.255
static (inside,outside) tcp interface smtp 192.168.200.6 smtp netmask 255.255.255.255
ASA# sh access-list
access-list cached ACL log flows: total 0, denied 0 (deny-flow-max 4096)
alert-interval 300
access-list outside_access_in; 7 elements
access-list outside_access_in line 1 extended permit icmp any interface outside (hitcnt=0) 0xbdd73ad6
access-list outside_access_in line 2 extended permit tcp any host 63.x.y.26 eq 951 (hitcnt=0) 0x3ce31844
access-list outside_access_in line 3 extended permit tcp any host 63.x.y.27 eq 952 (hitcnt=0) 0x47759ff9
access-list outside_access_in line 4 extended permit tcp any host 63.x.y.28 eq 953 (hitcnt=0) 0x34502744
access-list outside_access_in line 5 extended permit tcp any host 63.x.y.29 eq smtp (hitcnt=0) 0x9c033920
access-list outside_access_in line 6 extended permit tcp any host 63.x.y.26 eq smtp (hitcnt=0) 0xc254efef
access-list outside_access_in line 7 extended permit tcp any host 63.x.y.27 eq smtp (hitcnt=0) 0xc9867e83
reload, retry port 25 via 63.x.y.26, this is the log:
log file:
6|Aug 07 2008 08:46:18|302020: Built inbound ICMP connection for faddr 10.a.b.c/0 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:46:18|302021: Teardown ICMP connection for faddr 10.a.b.c/0 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:46:18|302020: Built inbound ICMP connection for faddr 10.a.b.c/0 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:46:18|302021: Teardown ICMP connection for faddr 10.a.b.c/0 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:46:18|302020: Built inbound ICMP connection for faddr 10.a.b.c/0 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:46:18|302021: Teardown ICMP connection for faddr 10.a.b.c/0 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:47:18|302020: Built inbound ICMP connection for faddr 10.a.b.c/256 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:47:18|302021: Teardown ICMP connection for faddr 10.a.b.c/256 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:47:18|302020: Built inbound ICMP connection for faddr 10.a.b.c/256 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:47:18|302021: Teardown ICMP connection for faddr 10.a.b.c/256 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:47:18|302020: Built inbound ICMP connection for faddr 10.a.b.c/256 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
6|Aug 07 2008 08:47:18|302021: Teardown ICMP connection for faddr 10.a.b.c/256 gaddr 63.x.y.26/0 laddr 63.x.y.26/0
10.a.b.c => source IP (PC that connect to test enc)
192.168.200.6 => destination IP (PC that listen to port 25)

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mydomain = jumico.com
mydomain_fallback = localhost
myhostname = mail.jumico.com
mynetworks = 127.0.0.0/8
mynetworks_style = host
newaliases_path = /usr/bin/newaliases
proxy_interfaces = 64.58.179.233
queue_directory = /private/var/spool/postfix
readme_directory = /usr/share/doc/postfix
sample_directory = /usr/share/doc/postfix/examples
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpdclientrestrictions = permit_mynetworks rejectrblclient sbl-xbl.spamhaus.org rejectrblclient bl.spamcop.net permit
smtpdpw_server_securityoptions = login,plain
smtpdrecipientrestrictions = permitsasl_authenticated,permit_mynetworks,reject_unauthdestination,permit
smtpdsasl_authenable = yes
smtpdtls_keyfile =
smtpduse_pwserver = yes
unknownlocal_recipient_rejectcode = 550
virtualmailboxdomains = hash:/etc/postfix/virtual_domains
virtual_transport = lmtp:unix:/var/imap/socket/lmtp
Any help would be appreciated.
Thanks
Mike

On your server, modify /etc/postfix/master.cf
Uncomment this single line:
#submission inet n - n - - smtpd
Save, then issue:
sudo postfix reload
From home, switch your mail client to use port 587 for SMTP.
This will work through COX.
You mention that others must want to send mail using their corp server, this is the solutions most companies use. Just open alternate ports.
Jeff

SMTP in problem

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