Добрый день!
письма не уходят с postfix на внешку, MAIL.ru отвечает

<kow_igor@mail.ru>: host mxs.mail.ru[94.100.176.20] said: 550 We cannot
    accept email from IP 195.98.*.* without a DNS PTR record. Contact your
    ISP/HSP to set up PTR record for your server. (in reply to end of DATA
    command)

server POSTFIX подключен через тот же модем что и MDAEMON, хотя с MDAEMON письма уходят нормально и на внешку и внутр.

при проверки PTR

root@mail:~# dig -x 195.98.*.*

; <<>> DiG 9.7.0-P1 <<>> -x 195.98.*.*
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22940
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;*.*.98.195.in-addr.arpa.      IN      PTR

;; AUTHORITY SECTION:
*.*.195.in-addr.arpa. 86400   IN      SOA     ns.ru. dnsmaster.ic.ru. 2008081920 14400 1800 1209600 86400

;; Query time: 25 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)        IP моего модема(через него и выходят мои почтовики)
;; WHEN: Wed Mar  6 10:16:06 2013
;; MSG SIZE  rcvd: 100

№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№№
root@mail:~# dig el.vrn.ru MX

; <<>> DiG 9.7.0-P1 <<>> el.vrn.ru MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59763
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 3, ADDITIONAL: 5

;; QUESTION SECTION:
;el.vrn.ru.                   IN      MX

;; ANSWER SECTION:
el.vrn.ru.            7200    IN      MX      5 mail.el.vrn.ru.
el.vrn.ru.            7200    IN      MX      10 el.vrn.ru.

;; AUTHORITY SECTION:
vrn.ru.                 7200    IN      NS      ns2.vrn.ru.
vrn.ru.                 7200    IN      NS      ns1.vrn.ru.
vrn.ru.                 7200    IN      NS      ns.vrn.ru.

;; ADDITIONAL SECTION:
mail.el.vrn.ru.       7200    IN      A       193.106.*.*
el.vrn.ru.            7200    IN      A       195.98.*.*
ns.vrn.ru.              7200    IN      A       195.98.*.*
ns1.vrn.ru.             7200    IN      A       195.98.*.*
ns2.vrn.ru.             7200    IN      A       195.98.*.*

;; Query time: 28 msec
;; SERVER: 192.168.200.1#53(192.168.200.1)
;; WHEN: Wed Mar  6 18:52:14 2013
;; MSG SIZE  rcvd: 199

postconf -n

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
body_checks = regexp:/etc/postfix/body_checks
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = scan:127.0.0.1:10025
header_checks = regexp:/etc/postfix/header_checks
home_mailbox = Maildir/
inet_interfaces = all
mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-dovecot-postfix.conf -n -m "${EXTENSION}"
mailbox_size_limit = 0
message_size_limit = 20000000
mydestination = localhost, localhost.$myhostname, $myhostname
mydomain = el.vrn.ru
myhostname = mail.el.vrn.ru
mynetworks = 127.0.0.0/8 192.168.100.0/24 192.168.200.0/24
myorigin = $mydomain
receive_override_options = no_address_mappings
recipient_delimiter = +
relay_domains = no
smtp_tls_note_starttls_offer = yes
smtp_use_tls = yes
smtpd_banner = $myhostname Welcome to the Sendmail server
smtpd_client_restrictions = permit_mynetworks,        permit_sasl_authenticated,
smtpd_recipient_restrictions = permit_mynetworks,       permit_sasl_authenticated,      reject_unknown_sender_domain,   reject_unknown_recipient_domain,        reject_unauth_pipelining,       reject_unauth_destination,      check_policy_service inet:127.0.0.1:10023
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = permit_mynetworks,  permit_sasl_authenticated,      reject_unknown_sender_domain
smtpd_tls_CAfile = /etc/postfix/ssl/smtpd.pem
smtpd_tls_CApath = /etc/ssl/cert
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.pem
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
transport_maps = hash:/etc/postfix/transport
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,mysql:/etc/postfix/mysql-email2email.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_minimum_uid = 1000
virtual_transport = dovecot
virtual_uid_maps = static:5000

master.cf

smtp      inet  n       -       -       -       -       smtpd
  -o content_filter=spamassassin
#  -o receive_override_options=
submission inet n       -       n       -       -       smtpd
  -o content_filter=spamassassin
  -o smtpd_tls_security_level=encrypt
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
  -o milter_macro_daemon_name=ORIGINATING
smtps     inet  n       -       n      -       -       smtpd
  -o content_filter=spamassassin
  -o smtpd_tls_wrappermode=yes
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
  -o milter_macro_daemon_name=ORIGINATING
#628       inet  n       -       -       -       -       qmqpd
pickup    fifo  n       -       -       60      1       pickup
cleanup   unix  n       -       -       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
#qmgr     fifo  n       -       -       300     1       oqmgr
tlsmgr    unix  -       -       -       1000?   1       tlsmgr
rewrite   unix  -       -       -       -       -       trivial-rewrite
bounce    unix  -       -       -       -       0       bounce
defer     unix  -       -       -       -       0       bounce
trace     unix  -       -       -       -       0       bounce
verify    unix  -       -       -       -       1       verify
flush     unix  n       -       -       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       -       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
        -o smtp_fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       -       -       -       showq
error     unix  -       -       -       -       -       error
retry     unix  -       -       -       -       -       error
discard   unix  -       -       -       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual

uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix  -       n       n       -       2       pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman   unix  -       n       n       -       -       pipe
  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
  ${nexthop} ${user}
dovecot unix - n n - - pipe
  flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -d ${recipient}

scan    unix    -       -       n       -       16      smtp
  -o smtp_send_xforward_command=yes

127.0.0.1:10026 inet    n       -       n       -       16      smtpd
  -o content_filter=
#  -o receive_override_options=no_address_mappings
  -o smtpd_helo_restrictions=
  -o smtpd_client_restrictions=
  -o smtpd_sender_restrictions=
  -o smtpd_recipient_restrictions=permit_mynetworks,reject
  -o mynetworks_style=host
  -o smtpd_authorized_xforward_hosts=127.0.0.0/8

spamassassin unix - n n - - pipe
    user=spamI argv=/usr/bin/spamc -f -e
    /usr/sbin/sendmail -oi -f ${sender} ${recipient}